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10-02-2014, 07:06 PM   #1
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Slide out window/door on lens hood

Just wondering what the slide out window/door things on my DA lens hoods are for?

10-02-2014, 07:09 PM   #2
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QuoteOriginally posted by almo Quote
Just wondering what the slide out window/door things on my DA lens hoods are for?
It's for polarizer filters, so you can turn them more easily without removing the hood.

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10-02-2014, 07:25 PM   #3
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QuoteOriginally posted by Adam Quote
It's for polarizer filters, so you can turn them more easily without removing the hood.
Thanks Adam!

I actually did try to search for the answer, but I guess i just didn't know the correct search terms, and my lenses were bought used on ebay, so I didn't get manuals with them.
10-03-2014, 05:45 AM   #4
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It's also one of the nicest "little perks" of going with Pentax. I can't understand why no other manufacturer has yet implemented this.

10-03-2014, 06:13 AM   #5
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QuoteOriginally posted by bdery Quote
It's also one of the nicest "little perks" of going with Pentax. I can't understand why no other manufacturer has yet implemented this.

That was the first thing I thought after reading Adam's reply. It's like, duh, why isn't everybody doing this?!
10-03-2014, 10:03 AM   #6
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I have been looking for a hood for my Sigma lenses that has this but no success so far.
10-03-2014, 10:15 AM   #7
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When using your WR lens in the rain, removing the "plug" allows the collected rain water to drain out safely.

10-06-2014, 05:33 AM   #8
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QuoteOriginally posted by maxxxx Quote
I have been looking for a hood for my Sigma lenses that has this but no success so far.
There is none, at least with search keywords in English. I've looked again and again. You could use a dremel to make one though, I've thought about doing that often.
10-06-2014, 05:38 AM   #9
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QuoteOriginally posted by bdery Quote
I can't understand why no other manufacturer has yet implemented this
Cos you end up losing the damn thing, so they thought better of it.
10-06-2014, 10:12 AM   #10
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QuoteOriginally posted by Kerrowdown Quote
Cos you end up losing the damn thing, so they thought better of it.
Well, mine are in the lens' original boxes. And even if you loose them, how is that a problem? The idea is to keep that window open...
10-06-2014, 10:17 AM   #11
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QuoteOriginally posted by bdery Quote
how is that a problem? The idea is to keep that window open...
Only when you want to twirl a polariser, otherwise you want the hood to act as a hood and stop stray light.
10-06-2014, 12:11 PM   #12
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QuoteOriginally posted by AquaDome Quote
When using your WR lens in the rain, removing the "plug" allows the collected rain water to drain out safely.
Lol, with the drought we are having I thought it was to let the extra dust and sand funnel out.
10-06-2014, 12:28 PM   #13
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I am a big fan of the folding rubber screw on hoods. Dirt cheap and unbreakable. Plus the shape makes it easy to use a polarized filter without the need for a hole.And they just look cool!
10-07-2014, 06:41 AM   #14
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QuoteOriginally posted by Kerrowdown Quote
Only when you want to twirl a polariser, otherwise you want the hood to act as a hood and stop stray light.
In fact, the most important part of the hood is at the front. My experience (and optical theory) shows that you can leave the window open with little to no effect.

EDIT : of course it might depend on the lens.
10-07-2014, 06:54 AM   #15
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QuoteOriginally posted by bdery Quote
shows that you can leave the window open with little to no effect
Well there you go, you learn something new everyday.
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