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Thread: Diopter Issues

  1. #1

    Default Diopter Issues

    Dear experts,

    I would like some advice. I am new to DSLR and using a Nikon D300s. As per manual to adjust the diopter, I found that when focus is locked on and I adjusted the diopter to clockwise maximum its almost sharp (I presumed) but I have a feeling it could be sharper but I can't find out since its at the maximum. The manual suggested getting the DK-20C to further compensate. What's your expert advice?

    I mostly shoot on tripod and manual focus but the shots came out not sharp even when subject is within 10 meters range. Most probably one in a hundred is sharp. Is this diopter issue the cause? Where can I purchase the recommended DK-20C? Does any of the regular camera stores have it or only Nikon S'pore since I couldn't find this particular model on their website?

    Note : I don't wear glasses but do experience slight dispersed lights in the night (San Guang). Think its called astigmatism.

    Thanks in advance.

    tbc

  2. #2
    Senior Member madmartian's Avatar
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    Default Re: Diopter Issues

    Quote Originally Posted by tbc666 View Post
    Dear experts,

    I would like some advice. I am new to DSLR and using a Nikon D300s. As per manual to adjust the diopter, I found that when focus is locked on and I adjusted the diopter to clockwise maximum its almost sharp (I presumed) but I have a feeling it could be sharper but I can't find out since its at the maximum. The manual suggested getting the DK-20C to further compensate. What's your expert advice?

    I mostly shoot on tripod and manual focus but the shots came out not sharp even when subject is within 10 meters range. Most probably one in a hundred is sharp. Is this diopter issue the cause? Where can I purchase the recommended DK-20C? Does any of the regular camera stores have it or only Nikon S'pore since I couldn't find this particular model on their website?

    Note : I don't wear glasses but do experience slight dispersed lights in the night (San Guang). Think its called astigmatism.

    Thanks in advance.

    tbc
    The diopter does not affect focussing. If its adjusted to the max @ +, that's the furthest it can go. It depends on your eyesight & need to be adjusted accordingly.
    If you shoot mostly on tripod, make sure the VR is off, that is if you are using VR lenses.
    That might be the problem of the result you get in your photos. It has got nothing to do with the diopter. You can shoot blindfolded, or even if the diopter is not tune to your eyesight, provided you are using a autofocus lens.
    As you mentioned, you have astig, so that may not give you 100% clear view in the viewfinder but I don't think it affect very much or even it might not affect your viewing unless your astig is real bad.
    Take the shot!

  3. #3

    Default Re: Diopter Issues

    Quote Originally Posted by tbc666 View Post
    Dear experts,

    I would like some advice. I am new to DSLR and using a Nikon D300s. As per manual to adjust the diopter, I found that when focus is locked on and I adjusted the diopter to clockwise maximum its almost sharp (I presumed) but I have a feeling it could be sharper but I can't find out since its at the maximum. The manual suggested getting the DK-20C to further compensate. What's your expert advice?

    I mostly shoot on tripod and manual focus but the shots came out not sharp even when subject is within 10 meters range. Most probably one in a hundred is sharp. Is this diopter issue the cause? Where can I purchase the recommended DK-20C? Does any of the regular camera stores have it or only Nikon S'pore since I couldn't find this particular model on their website?

    Note : I don't wear glasses but do experience slight dispersed lights in the night (San Guang). Think its called astigmatism.

    Thanks in advance.

    tbc
    What is your spectacle prescription?

  4. #4
    Senior Member madmartian's Avatar
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    Default Re: Diopter Issues

    Quote Originally Posted by Timolol View Post
    What is your spectacle prescription?
    He does not wear glasses
    Take the shot!

  5. #5

    Default Re: Diopter Issues

    Quote Originally Posted by madmartian View Post
    The diopter does not affect focussing. If its adjusted to the max @ +, that's the furthest it can go. It depends on your eyesight & need to be adjusted accordingly.
    If you shoot mostly on tripod, make sure the VR is off, that is if you are using VR lenses.
    That might be the problem of the result you get in your photos. It has got nothing to do with the diopter. You can shoot blindfolded, or even if the diopter is not tune to your eyesight, provided you are using a autofocus lens.
    As you mentioned, you have astig, so that may not give you 100% clear view in the viewfinder but I don't think it affect very much or even it might not affect your viewing unless your astig is real bad.
    Thanks madmartian for the reply, but you mentioned I can shoot blindfolded? I mean if the lens is a manual focus version without any CPU / motors inside, shouldn't the sharpness be determined by my eyesight?

    tbc

  6. #6
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    Default Re: Diopter Issues

    Quote Originally Posted by tbc666 View Post
    Thanks madmartian for the reply, but you mentioned I can shoot blindfolded? I mean if the lens is a manual focus version without any CPU / motors inside, shouldn't the sharpness be determined by my eyesight?

    tbc
    Are you using a manual focus lens?
    If you're not, I don't see the problem of shooting "blindfolded".

    I have lazy eye and I hate to wear my glasses when I shoot (I don't like to wear contacts either) and I have my diopter adjusted for my master eye. But I switch to the other (bad) eye when I use the holding technique suggested by Joe McNally etc when handholding telephotos with a longer shutter speed which requires looking through the viewfinder with the left eye.

    I can compose somewhat with the left eye and can also make out the focus dot although what I see through the viewfinder is blurred... I can't imagine trying to shoot with my manual focus lenses with my left eye. It is possible with the "digital rangefinder" in your camera if you are patient but it certainly won't be as fast as being able to see and focus for yourself with the correct diopter setting.

  7. #7

    Default Re: Diopter Issues

    Quote Originally Posted by aspenx View Post
    Are you using a manual focus lens?
    If you're not, I don't see the problem of shooting "blindfolded".

    I have lazy eye and I hate to wear my glasses when I shoot (I don't like to wear contacts either) and I have my diopter adjusted for my master eye. But I switch to the other (bad) eye when I use the holding technique suggested by Joe McNally etc when handholding telephotos with a longer shutter speed which requires looking through the viewfinder with the left eye.

    I can compose somewhat with the left eye and can also make out the focus dot although what I see through the viewfinder is blurred... I can't imagine trying to shoot with my manual focus lenses with my left eye. It is possible with the "digital rangefinder" in your camera if you are patient but it certainly won't be as fast as being able to see and focus for yourself with the correct diopter setting.

    Hi aspenx,

    Actually I shoot through a telescope (digiscoping) which I think is not popular in S'pore. BTW what is the purpose of the "digital rangefinder" and how does it affect me in my case of digiscoping?

    tbc

  8. #8
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    Default Re: Diopter Issues

    Quote Originally Posted by tbc666 View Post
    Hi aspenx,

    Actually I shoot through a telescope (digiscoping) which I think is not popular in S'pore. BTW what is the purpose of the "digital rangefinder" and how does it affect me in my case of digiscoping?

    tbc
    I don't know what digiscoping is, but laser rangefinders (those used for hunting etc) can give you a good reading of how far your subject is away from you (provided you can point fairly accurately at it). The super-enthusiastic photographers shooting in the dark use the reading to help with setting the focus on their lens.

  9. #9

    Default Re: Diopter Issues

    If the diopter adjustment is moved to the maximum +, and it feels clearer than it being at -, but still not totally clear, then you might want to check if you do have hyperopia (or presbyopia, depending on your age...)

  10. #10
    Senior Member madmartian's Avatar
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    Default Re: Diopter Issues

    Quote Originally Posted by tbc666 View Post
    Thanks madmartian for the reply, but you mentioned I can shoot blindfolded? I mean if the lens is a manual focus version without any CPU / motors inside, shouldn't the sharpness be determined by my eyesight?
    tbc
    Of course if you are using a manual focus lens then you have to focus with your good eye & you can't shoot blindfolded with that lens.
    Like what timolol mentioned, have your eyes checked by the optician
    Take the shot!

  11. #11

    Default Re: Diopter Issues

    I had diopter issues when I got my camera too.
    Proper diopter setting is a must when using manual focus, I was shooting macro @ 8cm away, which is a real problem when diopter is not calibrated.

    Set your camera on a tripod, spot focus.
    Use auto focus, and half-press to focus on the object.
    Now look through the view finder and turn the diopter until you can see that same object in the same focus. Now you're set

    If you can't turn the diopter far enough, you'll need to get the view finder addon as suggested.
    ex-Nikon owner - now only iPhone :/

  12. #12

    Default Re: Diopter Issues

    Quote Originally Posted by TroyP View Post
    I had diopter issues when I got my camera too.
    Proper diopter setting is a must when using manual focus, I was shooting macro @ 8cm away, which is a real problem when diopter is not calibrated.

    Set your camera on a tripod, spot focus.
    Use auto focus, and half-press to focus on the object.
    Now look through the view finder and turn the diopter until you can see that same object in the same focus. Now you're set

    If you can't turn the diopter far enough, you'll need to get the view finder addon as suggested.

    That's what I did as recommended in the manual. I tried calling Nikon S'pore on 03 May and they are closed. Will call them again these few days.

  13. #13

    Default Re: Diopter Issues

    Quote Originally Posted by aspenx View Post
    I don't know what digiscoping is, but laser rangefinders (those used for hunting etc) can give you a good reading of how far your subject is away from you (provided you can point fairly accurately at it). The super-enthusiastic photographers shooting in the dark use the reading to help with setting the focus on their lens.
    aspenx,

    Digiscoping is using P&S or DSLR to shoot through spotting scope or telescope. People overseas tried them very sucessfully though the bokeh is not as fantastic as standard lens due to absence of aperture ring. But the focal length can range from 1000 to 5000mm. IQ and sharpness is comparable to prime lens under ideal conditions. That's a poor man's long lens in my case.

  14. #14
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    Default Re: Diopter Issues

    How do you focus?

  15. #15

    Default Re: Diopter Issues

    Quote Originally Posted by aspenx View Post
    How do you focus?
    Manual focus. They have a focussing knob / wheel where you turn.

  16. #16
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    Default Re: Diopter Issues

    Quote Originally Posted by tbc666 View Post
    Manual focus. They have a focussing knob / wheel where you turn.
    There are no focus scales or anything to read the distance off from etc? Or do you have to really rely on just your eyesight (and diopters?) to focus?

  17. #17

    Default Re: Diopter Issues

    Quote Originally Posted by aspenx View Post
    There are no focus scales or anything to read the distance off from etc? Or do you have to really rely on just your eyesight (and diopters?) to focus?
    aspenx,

    Sorry to ask why do we need to tell the distance? I am new to photography! I connect the camera body to a Kenko 2X TC to an adapter and to the telescope. Look through the viewfinder, focus and shoot.

    tbc

  18. #18
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    Default Re: Diopter Issues

    You may want to read up on zone focusing then.

    Some of the best street photographers pre-focus their lenses to a certain distance and raise their cameras (or maybe not) to take the shot when the subject they want in focus falls into the "zone" while the photographers themselves may also be on the move.

    Another need to know the distance is for the calculation of depth of field and of course calibration, I guess.

  19. #19

    Default Re: Diopter Issues

    Quote Originally Posted by aspenx View Post
    You may want to read up on zone focusing then.

    Some of the best street photographers pre-focus their lenses to a certain distance and raise their cameras (or maybe not) to take the shot when the subject they want in focus falls into the "zone" while the photographers themselves may also be on the move.

    Another need to know the distance is for the calculation of depth of field and of course calibration, I guess.

    That is very chim indeed. I use this setup for birds and they can be so unpredictable as to where and when they want to land.

  20. #20

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