Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-12-2012, 12:11 AM   #1
Junior Member




Join Date: Aug 2012
Location: Minnesota
Posts: 37
Dumb Filter Question

Yes, very green here. Do I need a filter for my DA 50 1.4 and Da 55-300? And what kind? What size? I am thinking more for lens protection, but I don't want crappy ones that will wreck any pics. Just wondering! Thanks!!!

10-12-2012, 12:33 AM   #2
Senior Member
topace's Avatar

Join Date: Sep 2011
Location: Stockholm
Posts: 196
There are no dumb filters ;-)

Seriously though, there are reasons to use filters and reasons not to use them. If you don't want to introduce some optical effect, they aren't an absolute requirement.

I use UV filters to keep my front elements in close to mint condition if I ever want to sell the lenses. Even with good ones, however, I do feel the need to take them off to reduce flares at night.

A hard lens hood will provide a degree of protection against scratches without affecting the image. You might want to look into that.

The front glass of a lens is generally harder to mark than you think, and it generally makes less of an effect on the image than you think. I know people with multi-thousand-dollar equipment who use neither filters nor lens caps (front or back),
10-12-2012, 02:05 AM   #3
Pentaxian
calsan's Avatar

Join Date: Nov 2008
Location: Perth, Australia
Photos: Gallery
Posts: 1,371
The size you need is usually written on the front of your lenses. So for the 55-300, it's 58mm and the DA 50 (which oddly doesn't have it written on the front) it's 52 mm.
Hoya HMC filters are as good a place as any to start.
I mainly see the protection the filter offers as "protection against the need to clean your lenses".
Poor cleaning technique is the main risk to your lenses, more so than dropping them or walking into a wall.

You can tell the difference between a good multicoated filter (or lens) compared with an uncoated or cheaply coated filter by looking at reflections of lights in the filter.
The cheap filter will give bright reflections to any light sources, while the multicoated filter will give a very dull, often green or purple looking reflection.
10-12-2012, 03:58 AM   #4
Veteran Member
ChooseAName's Avatar

Join Date: Aug 2009
Location: Southeast USA
Photos: Gallery | Albums
Posts: 390
A polarizing filter is good for outdoor shooting in bright sunlight and will introduce contrast/saturation effects into photos that (for me!) would be a bit time consuming in processing.

If you really need to look up a filter size and the lens doesn't say what it is, check the lens database. If it's a modern lens still being sold online, the lens's listing page (on BH Photo, Adorama, etc) will list the filter diameter somewhere.

10-12-2012, 04:36 AM   #5
Site Supporter
rbefly's Avatar

Join Date: Oct 2009
Location: Denver, Colorado
Photos: Albums
Posts: 2,030
Filter or Not?

Hello Northmole, Welcome to the Forum!
The ongoing debate between "Filter or Not?" rages on.
My view is that a lens HOOD is the absolute best protection for the front element in most conditions, and should only be taken off for lens storage or cleaning.
However, in very dusty, rainy or bad weather conditions, I will put a UV filter on and suffer the slight loss (if any) of perfect clarity.
So, I've invested in (1 each) UV's in every size to fit my various lens/filter sizes.
These are in a filter pouch, along with circular polarizers in matching sizes. The CPL's are very useful for bright. sunny days, high contrast or highly reflective surfaces like water, glass or chrome. They also "Pop" out white clouds from blue skies and pump up the colors in scenic shots.
Buy the best filters you can afford. I like Marumi's, others prefer B + W or other top brands. Cheap filters are worse than useless, they actually degrade the image.
With modern DSLR's and PP, "effect" filters like graduated, diffusion and color tints aren't needed, you can add these effects much easier in PP and still retain the raw image data.
Keep your filters as clean and dust-free as the lens and carry them with you always.
JMO,
Ron
10-12-2012, 04:38 AM   #6
Site Supporter
Stone G.'s Avatar

Join Date: Jun 2010
Location: North Zealand, Denmark
Photos: Gallery | Albums
Posts: 1,513
QuoteOriginally posted by topace Quote
There are no dumb filters ;-)

- - - - - -

I use UV filters to keep my front elements in close to mint condition if I ever want to sell the lenses. Even with good ones, however, I do feel the need to take them off to reduce flares at night.

- - - - -
Same here. I feel much more comfortable with filters on when I am in harsh surroundings (like a windy day at the beach). It is much easier to clean and much cheaper to replace a filter than a lens. And I also agree: Filters can be taken on and off as the situation calls for.

QuoteOriginally posted by northmole Quote
- - - - - I am thinking more for lens protection, but I don't want crappy ones that will wreck any pics. Just wondering! Thanks!!!

Interestingly though, "crappy" doesn't necessarily mean "cheap". Someone (unfortunately, I don't remember who) here at PF posted this link recently:

http://www.lenstip.com/113.4-article-UV_filters_test_Description_of_the_results_and_summary.html

Food for thoughts, isn't it?
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!
camera, da, filter, pentax help, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ok, my first dumb K-5 question ukwoody Pentax K-5 15 11-25-2011 06:40 AM
probably a dumb question WDWmom Troubleshooting and Beginner Help 5 10-06-2011 12:56 AM
Dumb question... Paleki Pentax Film SLR Discussion 5 01-29-2011 01:02 PM
dumb question dankoBanana Pentax SLR Lens Discussion 2 11-07-2010 04:38 PM
Dumb question about starburst effects jct us101 Pentax Camera and Field Accessories 8 04-10-2010 07:40 AM



All times are GMT -7. The time now is 12:05 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