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DPChallenge Forums >> Photography Discussion >> Manual Focus problems
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 01/26/2005 08:33:30 PM · #1
Hey everyone,

I seem to be having difficulty focusing my lens manually. I'm used to manual focusing with my old 35mm Yashica, but for some reason, most of my D70 attemps are rather 'blurry'.

Now i know my eyes are good (i wear contact lens but they are to date) and when i snap the camera (very good freeze, up to 2000/s) the focus metter on the hud tells me i'm good.

But with all those working, my pics still seem rather blurry or out of focus.

The lens i use is a Nikkor 4/5.6 70-300mm.

anyone have a similar problem or have any suggestions has how to better approach the problem?

Thanks

pic

Message edited by author 2005-01-26 20:47:52.
 01/26/2005 08:37:37 PM · #2
have you checked the daiopter focus?
 01/26/2005 08:47:23 PM · #3
I'm not familiar with that term. What is it exactly?
 01/26/2005 09:02:31 PM · #4
Oh ok now i know what you mean (did a little search). That's an interesting question, i don't recall checking it... Is there a proper way to do this?

Thanks for the help, i'll check this out.

Is my pic out of focus or its me who's messed up?
 01/26/2005 09:07:38 PM · #5
it can be you don't really now... try using autofocus then when the camera is focused try turning the diaopter and see if you have it in focus... did i make myself clear or you think i need another shot on explaining. :)
Hope this helps.
 01/26/2005 09:09:08 PM · #6
The diopter focus adjustment allows you to adjust your camera's viewfinder so that you can view it without contacts or glasses. I don't think this is your problem becauseit sounds like you can see the image in focus and that it is being confirmed by the camera's own focus meter. Is it possible for you to post a cropped portion from your image that is at 100% magnification? That way we can see what you are talking about. Images from DSLR's normally appear a little bit soft when viewed at actual pixel size but they sharpen up nicely with the right sharpening tools. This may or may not be the issue you are seeing, it is just a guess. It will be easier for us to help you if you can post an example.

T
 01/26/2005 09:12:29 PM · #7
You might want to check out this web page...
Testing the Accuracy of SLR Camera Focusing system by Francis Poon.


01/27/2005 01:37:17 PM · #8
Ok well the diopter adjustment isn't the problem, i checked it earlier and its fine. As for posting a 100% cropped version of my exemple pic, i can't at the moment because i'm working on a very shitty computer laptop which ain't really good at anything else then checking emails. (opening a .raw imagine takes around 4 minutes...).

Btw, very interesting site micknewton, long but instructive read.

If by any chance the focusing of my camera is 'off' a little... how exactly do i fix it? do i have to send it to Nikon or something? (D70)... Is there a chance it might be 'cause of my "not so good" lens? I'm thinking of getting a 70-200 2.8 anyways...

01/27/2005 03:45:45 PM · #9
Originally posted by RedOak:
Btw, very interesting site micknewton, long but instructive read.

If by any chance the focusing of my camera is 'off' a little... how exactly do i fix it? do i have to send it to Nikon or something? (D70)... Is there a chance it might be 'cause of my "not so good" lens? I'm thinking of getting a 70-200 2.8 anyways...

If careful testing shows the focus to be off significantly then I would send it in to Nikon for adjustment. You should probably test the camera with other lenses if possible.

Yes, some lenses are definitely softer than others. But there are other factors which can cause your photos to be less than perfectly sharp (I think I̢۪ve experienced them all. ) Polarized light (glare) can cause a photo to be soft. A good polarizing filter can fix that. Obviously, camera shake or the movement of your subject isn̢۪t going to help. Try shooting a few shots with the light directly behind you, and use a tripod or beanbag to steady the camera and lens.

Good luck!


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