Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
08-02-2009, 07:01 AM   #1
New Member

Join Date: Aug 2009
Posts: 4
Filter Questions

1. Why is the Kenko Pro1 Protective lens more expensive than their MC UV filter; what are the key differences?
2. Which is the better buy when the UV is roughly 17USD and the Pro1 is 30USD?
3. For my Sigma 105mm F2.8 Macro is there anyway to cap the Hood so I don't need to unscrew and recap? Or is this a bad idea.

08-02-2009, 10:02 AM   #2
Senior Member

Join Date: Sep 2006
Posts: 220
The Sigma hood has 77mm filter threads. I don't bother with it, though. Instead I use a 58-49mm step down ring from eBay to match the filter size of my other lenses.
08-02-2009, 02:10 PM   #3
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,695
Pro1 series filters add very little optical quality to the multicoated profile of filters, their price tags misleading many to think they're significantly superior. Where they differ is in glass and frame thickness - the slimmer design claimed to avoid vignetting on those ultra-wide lenses and limit more flare/optical degradation due to light having to pass through less glass. Mostly gimmick.

If you're going to get a filter to protect the lens, just get the best multicoated one you can find, similar to the Hiya Super HMC series - though I don't have a filter for my 100/2.8 macro - the glass is deeply set within the lens barrel enough not to have to worry about scratching it.
08-02-2009, 05:14 PM   #4
New Member

Join Date: Aug 2009
Posts: 4
Original Poster
thanks a bunch!

So is it safe more me to just shoot the sigma with the hood. And leave a cap off? or could i get a 77mm lens cap?

08-04-2009, 01:41 AM   #5
Senior Member

Join Date: Mar 2007
Location: Brisbane, Qld, Australia
Posts: 165
Why would you want to add another 2 air to glass surfaces in your image path? Perhaps to protect the lens but as you surmise the pens hood provides fair protection.

  • 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, filter, pentax help, photography, uv
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
CPL filter questions for FA 31mm limited PentaJP Pentax SLR Lens Discussion 6 09-21-2014 07:02 PM
For Sale - Sold: Pentax and Albinar 2x TCs, 2 Cokin A filter sets, 49mm Filter and Macro tubes pxpaulx Sold Items 15 02-11-2010 09:09 PM
Filter Questions joejoe22802 Troubleshooting and Beginner Help 1 08-02-2009 07:08 AM
Polarzing and GND Filter Questions jmbower Pentax Camera and Field Accessories 3 03-14-2008 09:48 PM

All times are GMT -7. The time now is 09:15 PM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]