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Old 17th of December 2007 (Mon)   #31
Mark_Cohran
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Default Re: 40D Focusing Screen DIY - Pics inside

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Originally Posted by AperturePriority View Post
Thanks for the tutorial!

How much dust fell into the body cavity during this procedure? Did any stubborn ones end up on the sensor/filter screen?
How would you measure it?

Seriously, it doesn't take much longer to change out the screen than it does to change a lens. Besides, the mirror and the shutter are still covering the sensor during the whoe procedure.
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Old 17th of December 2007 (Mon)   #32
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Default Re: 40D Focusing Screen DIY - Pics inside

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Originally Posted by Mark_Cohran View Post
How would you measure it?

Seriously, it doesn't take much longer to change out the screen than it does to change a lens. Besides, the mirror and the shutter are still covering the sensor during the whoe procedure.
You mean you don't have a "dustometer?

Even thought the mirror and shutter would protect the sensor filter at that point in time, any dust that gets inside the body cavity could eventually wind up on the sensor filter with all the flapping and moving parts that happen when capturing an image.

I guess one should treat the focus screen operation just like a lens change--be in a conducive environment and take precautions.


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Old 17th of December 2007 (Mon)   #33
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Default Re: 40D Focusing Screen DIY - Pics inside

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Originally Posted by AperturePriority View Post
Thanks for the tutorial!

How much dust fell into the body cavity during this procedure? Did any stubborn ones end up on the sensor/filter screen?
Plus, any dust that does settle in is going to be the kind that the blower blows right out of there.
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Old 17th of December 2007 (Mon)   #34
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Default Re: 40D Focusing Screen DIY - Pics inside

Quote:
Originally Posted by AperturePriority View Post
You mean you don't have a "dustometer?

Even thought the mirror and shutter would protect the sensor filter at that point in time, any dust that gets inside the body cavity could eventually wind up on the sensor filter with all the flapping and moving parts that happen when capturing an image.

I guess one should treat the focus screen operation just like a lens change--be in a conducive environment and take precautions.
Or, you could just change lenses (or screens) and not worry about it too much.
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Old 18th of December 2007 (Tue)   #35
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Default Re: 40D Focusing Screen DIY - Pics inside

or just clean it, I found this is the easiest way:
http://farm3.static.flickr.com/2258/...d11790a1_o.jpg
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Old 18th of December 2007 (Tue)   #36
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Default Re: 40D Focusing Screen DIY - Pics inside

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Originally Posted by 71sbeetle View Post
or just clean it, I found this is the easiest way:
http://farm3.static.flickr.com/2258/...d11790a1_o.jpg
Wouldn't distilled water be preferable?
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Old 18th of December 2007 (Tue)   #37
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Default Re: 40D Focusing Screen DIY - Pics inside

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Wouldn't distilled water be preferable?
Na, not necessary. The little screen inside the faucet catches all the big stuff anyway.
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Old 18th of December 2007 (Tue)   #38
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Default Re: 40D Focusing Screen DIY - Pics inside

I use carbinated water. I figure the bubbles help loosen the tough stuff.
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Old 9th of September 2008 (Tue)   #39
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Default Re: 40D Focusing Screen DIY - Pics inside

considering getting one myself

i uploaded a picture that i made in photoshop, prob just a rough guestimate of what it looks like through the VF

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Last edited by Sfordphoto : 11th of September 2008 (Thu) at 19:00.
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Old 9th of September 2008 (Tue)   #40
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Default Re: 40D Focusing Screen DIY - Pics inside

Good job!
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Old 9th of September 2008 (Tue)   #41
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Default Re: 40D Focusing Screen DIY - Pics inside

The Katz Eye looks nice, but that's really too expensive unless you're used to using split image. I'm liking my Ef-S screen, and have since I first installed it on the first day I received the 40D. Maybe in the future I'll get the Ef-D, but I'm thinking that's more suited for a full frame body like a 5D.
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Old 10th of September 2008 (Wed)   #42
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Default Re: 40D Focusing Screen DIY - Pics inside

71SBeetle, thank you for sharing your quick and easy cleaning technique. If the 50D is sealed better like they say, draining is going to be a big issue. Maybe that's another reason to sit out this round.
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Old 11th of September 2008 (Thu)   #43
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Default Re: 40D Focusing Screen DIY - Pics inside

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Originally Posted by vibin247 View Post
The Katz Eye looks nice, but that's really too expensive unless you're used to using split image. I'm liking my Ef-S screen, and have since I first installed it on the first day I received the 40D. Maybe in the future I'll get the Ef-D, but I'm thinking that's more suited for a full frame body like a 5D.
Haha, i was actually thinking the reverse...waiting to get the precision matte screen for when I got a FF cam...but I got the EF-S for my 40D today, and I'm liking it
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Old 11th of September 2008 (Thu)   #44
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Default Re: 40D Focusing Screen DIY - Pics inside

ohh wow, that is simple.
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Old 11th of September 2008 (Thu)   #45
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Default Re: 40D Focusing Screen DIY - Pics inside

Thanks ! I will be doing this in the near future. Very Nice.
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