Improving focus

April 23rd, 2013
I am noticing that none of my recent photos (I haven't posted most of them) are in great focus. I have been doing manual, although some of them are auto also. I am going to do some testing on the auto situation to make sure the camera is on-target.

My question is if there is a known exercise to coordinate the diopter setting (is that the right term) of the viewfinder with my aging eyes. I plan to set the camera on the tripod, focus on a set of objects at different distances and make some marks on the diopter and analyze the results. But this seems a bit hit & miss ... is there a better way?

Also, do you think that is the problem? I do need to compare results with different lens. I guess this question is a bit premature, but I'll post it anyway and see what you pros have to suggest.

Thanks in advance for your insight.
April 23rd, 2013
You don't say what camera you are using - but if it is a DSLR then the single biggest improvement that anyone can make to their kit is to change the standard focus screen for a split screen focus one - the sort found on older film SLRs

Both my DSLRs were converted - a genuinely simple job, 2 mins, done at home - cost about £18 ($27US) and simply the most enjoyable, useful, upgrade that money (and not much of that!) can buy!!

They are available for most popular DSLRs, and I personally would not even consicer upgrading my kit unless the upgrade could be converted too.

And, of course, as you then can then focus using split screen alignment - the quality of the focus is not nearly so relient on your eyesight (unless you are so short sighted that you cant see the screen!!)


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>>Feeling Blue - my 365
April 23rd, 2013
And, as a bonus, once you have proper control over focus you are no longer stuck with expensive lens use - my favourite lens cost me £10 ($15US)

Industar 50-2 (because sometimes it's good to get back to basics)

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>>Feeling Blue - my 365
April 23rd, 2013
@styru - thanks for this tip. I found one for my Canon 40D for $20. The reviews do mention how much it helps peeps with glasses. Think I'll give it a try. Do you find it works in macro? The reviews indicate it is not good in macro.
April 23rd, 2013
@styru - and then I looked at the pics you posted with your lens ... guess that answered my macro question! Great shots ... I really like them.
April 23rd, 2013
What camera do you have? Have you looked at focusing screens? I changed the standard one on my 5d, to a ef-s screen, this was easy to do, and made manual focusing much easier
April 23rd, 2013
doh! didn't see the post above :)
April 23rd, 2013
Ah, I daydream about a decent split prism focusing screen sometimes...

I may get around to it at some point. Though I seem to recall something about it borking the light metering...?
April 23rd, 2013
@intymalcolm never been an issue - Just do it - you really wont believe just how much more you will enjoy having proper control.

(and if you are really worried about light - look at the link I posted above - the sample pics in that link are taken by me without auto focus, and without a light meter!)
April 23rd, 2013
@intymalcolm - The reviewers of this one specifically say it does not effect the metering. Although it does seem some others do.

Fotodiox Replacement Split Image Focusing Prism Screen for Canon EOS 40D, 50D, 60D
April 23rd, 2013
@styru Thanks for this info - going to look into it myself
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