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Old Dec 18, 2009, 4:07 AM   #1
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Default Focusing Screen 400D

I need help!

I have a coupld of fast m42 manual lenses and it's a pain to focus thru the small viewfinder of my 400d. So i thought i'd buy one of these ?

do these help ? do you have a better suggestion ? any feedback is appreciated!

http://cgi.ebay.co.uk/Split-Image-Fo...#ht_3254wt_940
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Old Dec 18, 2009, 6:39 AM   #2
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Originally Posted by BZChi7d View Post
I have a coupld of fast m42 manual lenses and it's a pain to focus thru the small viewfinder of my 400d. So i thought i'd buy one of these ?
A different focusing screen won't make your viewfinder any larger, and the split image/microprism can impede the use of your AF system's center focus point, the most accurate focus point on your camera, limiting the success you currently enjoy with your AF lenses.
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Old Dec 18, 2009, 8:23 AM   #3
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A different focusing screen won't make your viewfinder any larger, and the split image/microprism can impede the use of your AF system's center focus point, the most accurate focus point on your camera, limiting the success you currently enjoy with your AF lenses.
A new focusing screen should have no impact on a camera's autofocus performance (the AF sensors are located in the bottom of the mirror box and aren't impacted by the focusing screen). But, metering accuracy can be impacted by a new focusing screen.
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Old Dec 18, 2009, 9:41 AM   #4
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do you have a solution then ?
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Old Dec 18, 2009, 10:34 AM   #5
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Use Exposure Compensation if it throws off your metering. ;-)

Here's a recent thread discussing some of the options from popular manufacturers. I see one member mentioning that the Katz Eye design is a little better. You'll have to dig around to see how they compare.

http://forums.steves-digicams.com/pe...re-lenses.html
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Old Dec 21, 2009, 8:32 PM   #6
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I thought there was a setting or button you can push on the 400D so that the camera beeps when your lens is in focus with a manual lens?
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Old Dec 23, 2009, 6:51 AM   #7
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You can get focus confirmation when using an Autofocus lens with manual focus.

But, not with a lens via an adapter, unless you're using one with a chip built in that fools the camera into thinking it's got an Autofocus lens attached. You'll see those types of adapters advertised as having AF confirmation ability.
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