Filter access door?

JOlshefsky · 12-04-2013, 08:56 AM

I'm assuming this isn't Pentax-specific, but when I got a new-to-me K-x, I noted that there's a little door on the kit lens hood (PH-RBA). I've been searching and think it's called a "filter access", but why? I can't imagine you can actually remove and replace filters with the hood in place, and it's too small to permit a square filter like a Conkin. The only use I could fathom is to permit turning a circular polarizer.

So what's it for?

**LaurenOE** · 12-04-2013, 09:06 AM

It's for a circular polarizer so you can fiddle with the polarizing as you rotate the front element of the polarizer.

narual · 12-04-2013, 11:11 AM

Or a variable ND filter. Or a grad filter. Or a special effects filter (stars, multiple/split images, etc).

12-04-2013, 08:56 AM	#1
JOlshefsky New Member Join Date: Nov 2013 Location: Rochester, NY Posts: 3	Filter access door? I'm assuming this isn't Pentax-specific, but when I got a new-to-me K-x, I noted that there's a little door on the kit lens hood (PH-RBA). I've been searching and think it's called a "filter access", but why? I can't imagine you can actually remove and replace filters with the hood in place, and it's too small to permit a square filter like a Conkin. The only use I could fathom is to permit turning a circular polarizer. So what's it for?

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12-04-2013, 09:06 AM	#2
LaurenOE Site Supporter Join Date: Sep 2009 Location: Back in Florida, but worldwide gigs! Photos: Albums Posts: 3,690	It's for a circular polarizer so you can fiddle with the polarizing as you rotate the front element of the polarizer.

12-04-2013, 11:11 AM	#3
narual Veteran Member Join Date: Jun 2013 Location: South Bend (Notre Dame), Indiana Photos: Gallery \| Albums Posts: 1,988	Or a variable ND filter. Or a grad filter. Or a special effects filter (stars, multiple/split images, etc).