How can I set the aperture on my DSLR when it's attached to a telescope instead of a lens? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 23:30UTC (7:30pm US/Eastern) Proposal: Rules for *New* Photo Contest on Main SiteCan I shoot a photo with my DSLR without the lens on?Why does my DSLR's viewfinder ignore the aperture ring on a legacy lens?DSLRs with separate controls for aperture and shutter?How to calculate the size of the image circle at infinity focus?Canon: Setting exposure compensation in M mode?Can a Samsung NX300 shoot without a lens, for attaching to a telescope?Where can I find the maximum camera weight for my lens?How do I force my Canon dSLR (800D) to take a photo?How can I achieve more clarity in my photos of the moon?How can I get consistent exposure while allowing aperture changes on Fujifilm X-T2?
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How can I set the aperture on my DSLR when it's attached to a telescope instead of a lens?
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30UTC (7:30pm US/Eastern)
Proposal: Rules for *New* Photo Contest on Main SiteCan I shoot a photo with my DSLR without the lens on?Why does my DSLR's viewfinder ignore the aperture ring on a legacy lens?DSLRs with separate controls for aperture and shutter?How to calculate the size of the image circle at infinity focus?Canon: Setting exposure compensation in M mode?Can a Samsung NX300 shoot without a lens, for attaching to a telescope?Where can I find the maximum camera weight for my lens?How do I force my Canon dSLR (800D) to take a photo?How can I achieve more clarity in my photos of the moon?How can I get consistent exposure while allowing aperture changes on Fujifilm X-T2?
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I would like to use my Nikon D3100 for astrophotography. I have attached the camera to my telescope with a T-ring, after which the camera recognized the absence of the lens, which is perfectly normal. However, without the lens on, I am unable to adjust the aperture, which is extremely important for astrophotography. I can set the ISO, the shutter speed, and some other, minor things but not the Aperture.
I’m using the camera in manual mode.
Is setting the aperture without the lens even possible?
dslr camera-settings astrophotography
edited 35 mins ago
Michael C
135k7154384
asked 4 hours ago
Gergely KovacsGergely Kovacs
1083
New contributor
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I would like to use my Nikon D3100 for astrophotography. I have attached the camera to my telescope with a T-ring, after which the camera recognized the absence of the lens, which is perfectly normal. However, without the lens on, I am unable to adjust the aperture, which is extremely important for astrophotography. I can set the ISO, the shutter speed, and some other, minor things but not the Aperture.
I’m using the camera in manual mode.
Is setting the aperture without the lens even possible?
dslr camera-settings astrophotography
edited 35 mins ago
Michael C
135k7154384
asked 4 hours ago
Gergely KovacsGergely Kovacs
1083
New contributor
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I would like to use my Nikon D3100 for astrophotography. I have attached the camera to my telescope with a T-ring, after which the camera recognized the absence of the lens, which is perfectly normal. However, without the lens on, I am unable to adjust the aperture, which is extremely important for astrophotography. I can set the ISO, the shutter speed, and some other, minor things but not the Aperture.
I’m using the camera in manual mode.
Is setting the aperture without the lens even possible?
dslr camera-settings astrophotography
edited 35 mins ago
Michael C
135k7154384
asked 4 hours ago
Gergely KovacsGergely Kovacs
1083
New contributor
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I would like to use my Nikon D3100 for astrophotography. I have attached the camera to my telescope with a T-ring, after which the camera recognized the absence of the lens, which is perfectly normal. However, without the lens on, I am unable to adjust the aperture, which is extremely important for astrophotography. I can set the ISO, the shutter speed, and some other, minor things but not the Aperture.
I’m using the camera in manual mode.
Is setting the aperture without the lens even possible?
dslr camera-settings astrophotography
dslr camera-settings astrophotography
edited 35 mins ago
Michael C
135k7154384
asked 4 hours ago
Gergely KovacsGergely Kovacs
1083
New contributor
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 35 mins ago
Michael C
135k7154384
asked 4 hours ago
Gergely KovacsGergely Kovacs
1083
New contributor
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 35 mins ago
Michael C
135k7154384
edited 35 mins ago
Michael C
135k7154384
edited 35 mins ago
Michael C
135k7154384
135k7154384
asked 4 hours ago
Gergely KovacsGergely Kovacs
1083
New contributor
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
Gergely KovacsGergely Kovacs
1083
asked 4 hours ago
Gergely KovacsGergely Kovacs
1083
1083
New contributor
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Gergely Kovacs is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
Is setting the aperture without the lens even possible?
Considering that the aperture is a part of the lens, not the camera body, no, it is not possible.
Telescopes do not typically have variable apertures — there's no need to stop down to limit incoming light (which is absolutely the opposite of what is wanted for star photography), and depth of field control is meaningless when all objects are no closer than the moon.
The aperture of the telescope is the diameter of the front element. In ƒ-number terms, it is the ratio of the focal length of the telescope divided by the diameter of the front element. Be sure to use the same units (i.e., inches, or mm/cm/m).
answered 4 hours ago
scottbbscottbb
21k75896
I'm not sure about OP's camera - but I know some may refuse to shoot when no aperture is selected in certain modes. Do you know if this affects the D3100?
– Hueco
1 hour ago
1
@Hueco not sure precisely. It never occurred to me to use a t-mounted camera in anything other than manual mode. I had no problems shooting manual with a D90 mounted on a telescope, nor with my D800E on a scope.
– scottbb
1 hour ago
add a comment |
Check your telescope manual and find the telescope's aperture. Assuming no telescope eyepiece is utilized, the camera is said to be at the "prime focus" position. Find the scope's diameter. Find the scope's focal length. Divide focal length by diameter. The results of this math is the working f number of the system. Example: 1000mm focal length 4 inch diameter. Convert all units to millimeters. Inches to millimeters conversion is 25.4. Thus 1000 / (4 X 25.4) = 1000 / 101.6 = 9.8. Round to f/10. By the way, f/10 is typical of most systems.
answered 2 hours ago
Alan MarcusAlan Marcus
26k23060
add a comment |
WHAT aperture? A lens has focal length and aperture. The telescope is now the lens. As I understand telescopes, you pay money to get as LARGE an aperture as possible! Why is it important to adjust it?
answered 3 hours ago
Laurence PayneLaurence Payne
1,36346
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
Is setting the aperture without the lens even possible?
Considering that the aperture is a part of the lens, not the camera body, no, it is not possible.
Telescopes do not typically have variable apertures — there's no need to stop down to limit incoming light (which is absolutely the opposite of what is wanted for star photography), and depth of field control is meaningless when all objects are no closer than the moon.
The aperture of the telescope is the diameter of the front element. In ƒ-number terms, it is the ratio of the focal length of the telescope divided by the diameter of the front element. Be sure to use the same units (i.e., inches, or mm/cm/m).
answered 4 hours ago
scottbbscottbb
21k75896
I'm not sure about OP's camera - but I know some may refuse to shoot when no aperture is selected in certain modes. Do you know if this affects the D3100?
– Hueco
1 hour ago
1
@Hueco not sure precisely. It never occurred to me to use a t-mounted camera in anything other than manual mode. I had no problems shooting manual with a D90 mounted on a telescope, nor with my D800E on a scope.
– scottbb
1 hour ago
add a comment |
Is setting the aperture without the lens even possible?
Considering that the aperture is a part of the lens, not the camera body, no, it is not possible.
Telescopes do not typically have variable apertures — there's no need to stop down to limit incoming light (which is absolutely the opposite of what is wanted for star photography), and depth of field control is meaningless when all objects are no closer than the moon.
The aperture of the telescope is the diameter of the front element. In ƒ-number terms, it is the ratio of the focal length of the telescope divided by the diameter of the front element. Be sure to use the same units (i.e., inches, or mm/cm/m).
answered 4 hours ago
scottbbscottbb
21k75896
I'm not sure about OP's camera - but I know some may refuse to shoot when no aperture is selected in certain modes. Do you know if this affects the D3100?
– Hueco
1 hour ago
1
@Hueco not sure precisely. It never occurred to me to use a t-mounted camera in anything other than manual mode. I had no problems shooting manual with a D90 mounted on a telescope, nor with my D800E on a scope.
– scottbb
1 hour ago
add a comment |
Is setting the aperture without the lens even possible?
Considering that the aperture is a part of the lens, not the camera body, no, it is not possible.
Telescopes do not typically have variable apertures — there's no need to stop down to limit incoming light (which is absolutely the opposite of what is wanted for star photography), and depth of field control is meaningless when all objects are no closer than the moon.
The aperture of the telescope is the diameter of the front element. In ƒ-number terms, it is the ratio of the focal length of the telescope divided by the diameter of the front element. Be sure to use the same units (i.e., inches, or mm/cm/m).
answered 4 hours ago
scottbbscottbb
21k75896
Is setting the aperture without the lens even possible?
Considering that the aperture is a part of the lens, not the camera body, no, it is not possible.
Telescopes do not typically have variable apertures — there's no need to stop down to limit incoming light (which is absolutely the opposite of what is wanted for star photography), and depth of field control is meaningless when all objects are no closer than the moon.
The aperture of the telescope is the diameter of the front element. In ƒ-number terms, it is the ratio of the focal length of the telescope divided by the diameter of the front element. Be sure to use the same units (i.e., inches, or mm/cm/m).
answered 4 hours ago
scottbbscottbb
21k75896
edited 4 hours ago
answered 4 hours ago
scottbbscottbb
21k75896
answered 4 hours ago
scottbbscottbb
21k75896
answered 4 hours ago
scottbbscottbb
21k75896
21k75896
I'm not sure about OP's camera - but I know some may refuse to shoot when no aperture is selected in certain modes. Do you know if this affects the D3100?
– Hueco
1 hour ago
1
@Hueco not sure precisely. It never occurred to me to use a t-mounted camera in anything other than manual mode. I had no problems shooting manual with a D90 mounted on a telescope, nor with my D800E on a scope.
– scottbb
1 hour ago
add a comment |
I'm not sure about OP's camera - but I know some may refuse to shoot when no aperture is selected in certain modes. Do you know if this affects the D3100?
– Hueco
1 hour ago
1
@Hueco not sure precisely. It never occurred to me to use a t-mounted camera in anything other than manual mode. I had no problems shooting manual with a D90 mounted on a telescope, nor with my D800E on a scope.
– scottbb
1 hour ago
I'm not sure about OP's camera - but I know some may refuse to shoot when no aperture is selected in certain modes. Do you know if this affects the D3100?
– Hueco
1 hour ago
I'm not sure about OP's camera - but I know some may refuse to shoot when no aperture is selected in certain modes. Do you know if this affects the D3100?
– Hueco
1 hour ago
1
1
@Hueco not sure precisely. It never occurred to me to use a t-mounted camera in anything other than manual mode. I had no problems shooting manual with a D90 mounted on a telescope, nor with my D800E on a scope.
– scottbb
1 hour ago
@Hueco not sure precisely. It never occurred to me to use a t-mounted camera in anything other than manual mode. I had no problems shooting manual with a D90 mounted on a telescope, nor with my D800E on a scope.
– scottbb
1 hour ago
add a comment |
Check your telescope manual and find the telescope's aperture. Assuming no telescope eyepiece is utilized, the camera is said to be at the "prime focus" position. Find the scope's diameter. Find the scope's focal length. Divide focal length by diameter. The results of this math is the working f number of the system. Example: 1000mm focal length 4 inch diameter. Convert all units to millimeters. Inches to millimeters conversion is 25.4. Thus 1000 / (4 X 25.4) = 1000 / 101.6 = 9.8. Round to f/10. By the way, f/10 is typical of most systems.
answered 2 hours ago
Alan MarcusAlan Marcus
26k23060
add a comment |
Check your telescope manual and find the telescope's aperture. Assuming no telescope eyepiece is utilized, the camera is said to be at the "prime focus" position. Find the scope's diameter. Find the scope's focal length. Divide focal length by diameter. The results of this math is the working f number of the system. Example: 1000mm focal length 4 inch diameter. Convert all units to millimeters. Inches to millimeters conversion is 25.4. Thus 1000 / (4 X 25.4) = 1000 / 101.6 = 9.8. Round to f/10. By the way, f/10 is typical of most systems.
answered 2 hours ago
Alan MarcusAlan Marcus
26k23060
add a comment |
Check your telescope manual and find the telescope's aperture. Assuming no telescope eyepiece is utilized, the camera is said to be at the "prime focus" position. Find the scope's diameter. Find the scope's focal length. Divide focal length by diameter. The results of this math is the working f number of the system. Example: 1000mm focal length 4 inch diameter. Convert all units to millimeters. Inches to millimeters conversion is 25.4. Thus 1000 / (4 X 25.4) = 1000 / 101.6 = 9.8. Round to f/10. By the way, f/10 is typical of most systems.
answered 2 hours ago
Alan MarcusAlan Marcus
26k23060
Check your telescope manual and find the telescope's aperture. Assuming no telescope eyepiece is utilized, the camera is said to be at the "prime focus" position. Find the scope's diameter. Find the scope's focal length. Divide focal length by diameter. The results of this math is the working f number of the system. Example: 1000mm focal length 4 inch diameter. Convert all units to millimeters. Inches to millimeters conversion is 25.4. Thus 1000 / (4 X 25.4) = 1000 / 101.6 = 9.8. Round to f/10. By the way, f/10 is typical of most systems.
answered 2 hours ago
Alan MarcusAlan Marcus
26k23060
answered 2 hours ago
Alan MarcusAlan Marcus
26k23060
answered 2 hours ago
Alan MarcusAlan Marcus
26k23060
answered 2 hours ago
Alan MarcusAlan Marcus
26k23060
26k23060
add a comment |
add a comment |
WHAT aperture? A lens has focal length and aperture. The telescope is now the lens. As I understand telescopes, you pay money to get as LARGE an aperture as possible! Why is it important to adjust it?
answered 3 hours ago
Laurence PayneLaurence Payne
1,36346
add a comment |
WHAT aperture? A lens has focal length and aperture. The telescope is now the lens. As I understand telescopes, you pay money to get as LARGE an aperture as possible! Why is it important to adjust it?
answered 3 hours ago
Laurence PayneLaurence Payne
1,36346
add a comment |
WHAT aperture? A lens has focal length and aperture. The telescope is now the lens. As I understand telescopes, you pay money to get as LARGE an aperture as possible! Why is it important to adjust it?
answered 3 hours ago
Laurence PayneLaurence Payne
1,36346
WHAT aperture? A lens has focal length and aperture. The telescope is now the lens. As I understand telescopes, you pay money to get as LARGE an aperture as possible! Why is it important to adjust it?
answered 3 hours ago
Laurence PayneLaurence Payne
1,36346
answered 3 hours ago
Laurence PayneLaurence Payne
1,36346
answered 3 hours ago
Laurence PayneLaurence Payne
1,36346
answered 3 hours ago
Laurence PayneLaurence Payne
1,36346
1,36346
add a comment |
add a comment |
Gergely Kovacs is a new contributor. Be nice, and check out our Code of Conduct.
Gergely Kovacs is a new contributor. Be nice, and check out our Code of Conduct.
Gergely Kovacs is a new contributor. Be nice, and check out our Code of Conduct.
Gergely Kovacs is a new contributor. Be nice, and check out our Code of Conduct.
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