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 Post subject: viewfider eyepiece cap
PostPosted: Fri Jun 15, 2007 7:15 pm 
Could someone please tell me when and why you would use this?

 Post subject: Good Question!
PostPosted: Fri Jun 15, 2007 8:26 pm 
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Joined: Fri Jun 01, 2007 12:40 am
Posts: 1331
Location: Scotland
Read the manual.

Like I did.

And still not understand.

Like I did.

:wink: :lol:



Various lenses, SB800 & Manfrotto 190 with 460MG head

 Post subject:
PostPosted: Fri Jun 15, 2007 8:37 pm 

 Post subject:
PostPosted: Fri Jun 15, 2007 9:07 pm 
Basicly light can get in the viewfinder in long exposers in some case and screw things up.

Don't live me credit for this copied it of some other forums :P

The problem is the exposure meter. The sensors for the meter are located in the prism area, and of course they measure whatever light hits them. They cannot distinguish between light arriving from below (ie through the lens) and light arriving from above (ie through the viewfinder).

This can be quite significant in some cases. If you're shooting with the sun at your back, you could pretty much have the sun shining directly on the meter, causing the picture to be drastically underexposed. Of course, if you are looking through the finder when the reading is taken, you're blocking most of that, so it's normally no big deal. But if you're using the self timer, a cable release or a remote trigger, you aren't there to block that light.

Using the eyecap is not necessary - anything that blocks the light is sufficient. Your hand, a dark t-shirt, etc all work.

 Post subject:
PostPosted: Fri Jun 15, 2007 10:24 pm 
Site Admin
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Joined: Tue Nov 08, 2005 3:32 pm
Posts: 9978
Location: Queenstown, New Zealand
Antony's right - the eyecap is used to stop stray light entering the viewfinder when you don't have your eye up against it. Tripod users beware!

To be honest though, I've never experienced it as an issue.


 Post subject:
PostPosted: Sat Jun 16, 2007 9:27 am 
Antman, Gordon

I thank you.


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