Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-13-2009, 06:36 AM   #31
Forum Member
shiestmiester's Avatar

Join Date: Jul 2008
Location: Buffalo, NY
Posts: 97
parallax - i agree 17mm is 17mm. however when you are using a full frame lens on an APS-C size sensor you get the 1.5x zoom factor. This makes a FF 17mm a 23.5mm on a pentax DSLR.

Great for telephoto (300mm=450mm) not so great for super-wide, hence why i purchased the Di II lens for wide application.

Did no one else know about this?

~T

04-13-2009, 06:57 AM   #32
Senior Moderator
Loyal Site Supporter
Parallax's Avatar

Join Date: Apr 2008
Location: South Dakota
Photos: Gallery
Posts: 19,324
QuoteOriginally posted by shiestmiester Quote
parallax - i agree 17mm is 17mm. however when you are using a full frame lens on an APS-C size sensor you get the 1.5x zoom factor. This makes a FF 17mm a 23.5mm on a pentax DSLR.

Great for telephoto (300mm=450mm) not so great for super-wide, hence why i purchased the Di II lens for wide application.

Did no one else know about this?

~T
Yes, and when you use a 17mm APS-C specific lens on an APS-C sensor you get EXACTLY the same effect. 1.5X factor! (Vs FF) 17mm FF and 17mm APS-C capture exactly the same image on an APS-C sensor. This is easy enough to demonstrate. Put your camera on a tripod, put your SMC M 50mm 1.7 on and take a picture. Now put your 17-50 on, set it at 50mm and take another shot.

EDIT: Don't you find it a bit odd, that with the wealth of knowledge and expertise on this board that "no one else knows about" it?

Last edited by Parallax; 04-13-2009 at 07:04 AM.
04-13-2009, 07:55 AM   #33
Veteran Member
ivoire's Avatar

Join Date: Mar 2007
Photos: Gallery
Posts: 3,381
There are many great zooms for Pentax on the market. Some will fill gaps where there are no primes. Once you determine the range(s) you shoot at, pick up the primes that compliment your style and 'usual' focal range. The Pentax 12-24, 17-70, and 50-135 covers the majority and are great lenses. Shooting long, 300mm and up, will have some cost considerations.
04-13-2009, 06:49 PM   #34
Pentaxian
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 16,479
I've never seen an image yet that made me say "I must have the lens that took that shot" - except the fisheye. The fact it was a zoom was a bonus :-)

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!
50mm, focus, k-mount, lens, pentax lens, primes, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
News Merry Christmas, Happy Holidays, and Happy New Year! Adam Site Suggestions and Help 75 12-26-2014 12:27 AM
DA 55-300mm (Happy Happy - Joy Joy) devs66 Pentax SLR Lens Discussion 78 04-27-2010 11:43 PM
Merry Christmas, Happy Hanukkah and Happy Holidays... benjikan General Talk 8 12-25-2009 11:10 PM
Zooms and you pingflood Pentax SLR Lens Discussion 30 03-19-2009 02:02 PM
DA* Zooms morfic Pentax SLR Lens Discussion 0 08-25-2008 02:23 PM



All times are GMT -7. The time now is 05:57 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