Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-05-2017, 10:46 AM   #1
Junior Member




Join Date: Nov 2017
Posts: 49
Pentax-DA 40mm F2.8 Limited Polarizing filter with hood?

Pentax-DA 40mm F2.8 Limited

Does anyone use a 49mm polarizing filter (or any filter) with this, along with the lens hood?

12-05-2017, 12:13 PM   #2
Loyal Site Supporter
Loyal Site Supporter




Join Date: Mar 2015
Photos: Gallery | Albums
Posts: 6,347
I used to use protective UV/skylight filters on everything, but now I've started unsubscribing to that philosophy. Polarising filters are a thing for very specific purposes, but if you need one, you need one and never mind the lens.
12-05-2017, 12:33 PM - 1 Like   #3
Site Supporter
Site Supporter
Kevin B123's Avatar

Join Date: Jul 2016
Location: Hampshire
Photos: Gallery | Albums
Posts: 1,240
I have used one under the hood, and a 9 stop nd filter no problems.
Attached Images
View Picture EXIF
PENTAX K-3 II  Photo 
12-05-2017, 12:46 PM   #4
Site Supporter
Site Supporter
Alex645's Avatar

Join Date: May 2015
Location: Kaneohe, HI
Photos: Albums
Posts: 2,592
QuoteOriginally posted by rptdc Quote
Pentax-DA 40mm F2.8 Limited

Does anyone use a 49mm polarizing filter (or any filter) with this, along with the lens hood?
Great question, and my answer is....not yet.

But if you think it through, here are the pros and cons:

a) 49mm polarizer with hood on top:
Pro: filter protected from finger prints and impact, more common size and more polarizer choices, filter better shaded with hood from flare
Con: harder to clean filter, focusing ring and polarizer ring in close proximity with a pancake lens...harder to twist filter without accidentally changing focus

b) 37mm 30.5mm polarizer with hood underneath:
Pro: easier to clean, easier to twist without accidentally changing focus, looks cool
Con: more potential for flare, filter more likely to get smudged or scratched

With that in mind, I'd opt for "a" but am looking forward to seeing what others have actually experienced.


Last edited by Alex645; 12-05-2017 at 05:00 PM. Reason: incorrect filter size
12-05-2017, 01:26 PM   #5
Junior Member




Join Date: Nov 2017
Posts: 49
Original Poster
QuoteOriginally posted by Kevin B123 Quote
I have used one under the hood, and a 9 stop nd filter no problems.
Thank you!

---------- Post added 12-05-17 at 02:30 PM ----------

QuoteOriginally posted by Alex645 Quote
Great question, and my answer is....not yet.

But if you think it through, here are the pros and cons:

a) 49mm polarizer with hood on top:
Pro: filter protected from finger prints and impact, more common size and more polarizer choices, filter better shaded with hood from flare
Con: harder to clean filter, focusing ring and polarizer ring in close proximity with a pancake lens...harder to twist filter without accidentally changing focus

b) 37mm polarizer with hood underneath:
Pro: easier to clean, easier to twist without accidentally changing focus, looks cool
Con: more potential for flare, filter more likely to get smudged or scratched

With that in mind, I'd opt for "a" but am looking forward to seeing what others have actually experienced.
Hmmm. I never thought about a polarizer out on the hood thread.

I too think 'a' is the primary option. I was mainly concerned of vignetting if I would be moving the 'hood' out further from the lens. Sounds like Kevin B123 has tested this successfully.

Thank you.
12-05-2017, 01:51 PM   #6
Site Supporter
Site Supporter
Alex645's Avatar

Join Date: May 2015
Location: Kaneohe, HI
Photos: Albums
Posts: 2,592
QuoteOriginally posted by rptdc Quote
I was mainly concerned of vignetting if I would be moving the 'hood' out further from the lens. Sounds like Kevin B123 has tested this successfully.
Good point. I think f/2.8 and the pancake design prevents that from happening, although you can always test this yourself wide open with just a clear filter of a white wall.

If the 40mm was f/2 or less, then I'd be concerned.
12-05-2017, 01:55 PM   #7
Loyal Site Supporter
Loyal Site Supporter




Join Date: Feb 2010
Location: Maryland
Posts: 431
I use a 49 mm circular polarizer and a rubber hood. I only use the normal hood with no polarizer. The 49 mm rubber hoods work pretty well. If you get a wide angle version you can use on the DA 21 also or use the DA 40 on the K-1.

Last edited by Pentax Syntax; 12-05-2017 at 02:05 PM.
12-05-2017, 02:55 PM   #8
Loyal Site Supporter
Loyal Site Supporter




Join Date: Feb 2010
Location: Maryland
Posts: 431
QuoteOriginally posted by Kevin B123 Quote
I have used one under the hood, and a 9 stop nd filter no problems.
I agree this configuration works on crop bodies with only the slightest bit of darkening of the corners wide open. On full frame (K-1) you really need to remove the hood though. I go with a rubber hood in that case.

12-05-2017, 03:48 PM - 1 Like   #9
Pentaxian
Paul the Sunman's Avatar

Join Date: Aug 2011
Location: Melbourne
Photos: Gallery
Posts: 2,337
QuoteOriginally posted by Alex645 Quote
b) 37mm polarizer with hood underneath:
The outer thread on the DA 40 hood is 30.5 mm, not 37 mm. I have, but no longer use, a 30.5 mm UV filter which I fitted INSIDE the hood, so there was no danger of additional vignetting. (It will screw into the hood either inside or outside.)

This isn't so convenient for a polarising filter though.
12-05-2017, 04:50 PM   #10
Site Supporter
Site Supporter
Madaboutpix's Avatar

Join Date: Dec 2011
Location: North-Rhine Westphalia
Posts: 795
QuoteOriginally posted by Paul the Sunman Quote
The outer thread on the DA 40 hood is 30.5 mm, not 37 mm.

Er, the inner thread being 30.5mm, more likely? But we get the picture nonetheless, I guess.
12-05-2017, 04:54 PM   #11
Pentaxian
Saltwater Images's Avatar

Join Date: Nov 2014
Location: Newfoundland
Photos: Gallery
Posts: 496
I often use a Hoya Pro 49 mm polarizing filter or a B+W 49 mm variable filter on the HD DA 40. Screw the filter on the lens then screw the hood on the filter. No issues.
12-05-2017, 05:03 PM   #12
Site Supporter
Site Supporter
Alex645's Avatar

Join Date: May 2015
Location: Kaneohe, HI
Photos: Albums
Posts: 2,592
QuoteOriginally posted by Paul the Sunman Quote
The outer thread on the DA 40 hood is 30.5 mm, not 37 mm.
Correct, 30.5mm NOT 37mm for the inner thread.

I don't like the screw-in lens cap, so I just use a 35mm Fujifilm film canister cap. I corrected my earlier post, thanks!
12-05-2017, 05:30 PM   #13
Junior Member




Join Date: Nov 2017
Posts: 49
Original Poster
QuoteOriginally posted by Alex645 Quote
Good point. I think f/2.8 and the pancake design prevents that from happening, although you can always test this yourself wide open with just a clear filter of a white wall.

If the 40mm was f/2 or less, then I'd be concerned.
I am looking forward to trying this. ...I have the 40mm F2.8 Limited and even a 49mm UV filter....but no K70 camera body yet . The K70 should be coming this week.

---------- Post added 12-05-17 at 06:32 PM ----------

QuoteOriginally posted by Saltwater Images Quote
I often use a Hoya Pro 49 mm polarizing filter or a B+W 49 mm variable filter on the HD DA 40. Screw the filter on the lens then screw the hood on the filter. No issues.
Great! Thanks.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
40mm, f2.8, filter, flare, focus, hood, k-mount, k70, mm, pentax lens, pentax-da, pentax-da 40mm f2.8, polarizer, polarizing, screw, slr lens, twist
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Da 35 2.4 with Marumi Super DHG Polarizing Filter and Hood zbrueningsen Sold Items 2 05-09-2014 07:16 PM
Lens polarizing Filter for 15mm limited and 18-135 Skipper74 Pentax K-5 3 01-05-2013 10:13 PM
Lens hood or polarizing filter? el baroda Pentax DSLR Discussion 11 07-22-2012 06:13 AM
For Sale - Sold: DA 21mm limited, DA 40mm limited, DA* 16-50mm, DA* 50-135mm kphelan Sold Items 13 05-24-2011 02:47 PM



All times are GMT -7. The time now is 07:43 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top