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05-20-2013, 08:23 AM   #1
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Join Date: May 2011
Posts: 27
Rear baffle for the 6x7 300/f4?

I seem to have lost the exit baffle for my S-M-C Takumar 6x7 300 f/4. It was always loose, but I must have gotten careless when changing lenses in the field because now it's gone.

Would someone be able to tell me the dimensions of the hole so I could make one for myself out of cardboard?

Alternately - how important is this baffle to image quality? I would almost never shoot this lens wide open; it's much better when stopped down to f/8 or f/11; does that make a difference to the usefulness of the baffle?

Thanks,
Sterling

05-21-2013, 10:39 AM   #2
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Join Date: Feb 2009
Location: Arizona
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I can't give you the dimensions of the baffle, as I sold mine after using it for 15 years. The baffle is important because it prevents off axis light from bouncing off the inner barrel. I had to make a baffle for my 400 Takumar and found that it had to be very anti-reflective to work right.
05-21-2013, 12:12 PM   #3
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Join Date: Mar 2011
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Sterling,

According to my cheap caliper, the opening on my copy is approx. 42.5mm wide and 35mm high (measured across the center).

Here's a picture:


05-21-2013, 10:22 PM   #4
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Original Poster
Thanks!

QuoteOriginally posted by all thumbs Quote
Sterling,

According to my cheap caliper, the opening on my copy is approx. 42.5mm wide and 35mm high (measured across the center)
All Thumbs, you are beautiful. Thank you.

Sterling

05-22-2013, 09:19 AM   #5
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You're very welcome, Sterling. I'm glad I could help.
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