Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-27-2007, 10:52 PM   #1
Site Supporter
Bramela's Avatar

Join Date: Jan 2007
Location: Newcastle Australia
Photos: Gallery | Albums
Posts: 5,281
sigma APO lens

Pardon my ignorance, could one of you more knowledgable guys please advise me, Sigma APO lens, is that suitable for digital slr (K10d) or are they less suitable than the DG.
Many thanks

01-28-2007, 01:36 AM   #2
Senior Member
peted's Avatar

Join Date: Nov 2006
Location: Canberra, Australia
Photos: Gallery
Posts: 133
APO mostly means that it is apochromatic.

Apochromat - Wikipedia, the free encyclopedia

Little bit better lens for a little bit more.
01-28-2007, 08:37 AM   #3
Veteran Member
WMBP's Avatar

Join Date: Dec 2006
Location: Dallas, Texas
Photos: Gallery
Posts: 2,496
QuoteOriginally posted by Bramela Quote
Pardon my ignorance, could one of you more knowledgable guys please advise me, Sigma APO lens, is that suitable for digital slr (K10d) or are they less suitable than the DG.
You may find this useful:

Lens Technology - SIGMA CORPORATION

It explains all the shorthands used in Sigma's lens naming system.

One of the advantages of using a digital SLR is that you can use with your digital SLR old lenses that were originally designed for film SLRs. Just because a lens was not made specifically for digital does not mean it won't work or won't take great pictures with your K10D. However, the lens makers are now refining their technology to address specifically digital issues. Sigma's digital lenses are marked DC or DG. Tamron's are marked as Di or Di-II.

Here's a link to a page on Tamron's web site that identifies some of their shorthands:

Tamron Lenses; Award Winning Conventional, Digital Lenses

The Di-II lenses can only be used with certain digital cameras with physically smaller sensors. I know this includes the K100D. I think it includes the K10D too but I don't have a K10D so please confirm this for yourself.

By the way, Tamron has some excellent info on choosing lenses on its web site, here:

Choosing the Right Lens, Tamron USA

Will

Last edited by WMBP; 01-28-2007 at 08:44 AM.
01-28-2007, 08:58 AM   #4
Veteran Member




Join Date: Dec 2006
Location: Washington, D.C., USA
Photos: Gallery
Posts: 417
QuoteOriginally posted by Bramela Quote
Pardon my ignorance, could one of you more knowledgable guys please advise me, Sigma APO lens, is that suitable for digital slr (K10d) or are they less suitable than the DG.
Many thanks
A Sigma lens with APO is a better quality than a lens without the designation. The DG indicates a lens designed for optimum performance on a DSLR but also will work on a 35mm SLR. The two designations are not exclusive. You can have an APO with or without the DG. For a DSLR the "better" lens in terms of quality images would be an APO DG. Sigma should be awarded a prize for most lens designations.

Best,
Erl

01-28-2007, 11:05 PM   #5
Site Supporter
Bramela's Avatar

Join Date: Jan 2007
Location: Newcastle Australia
Photos: Gallery | Albums
Posts: 5,281
Original Poster
Many thanks you have made things a lot clearer for me to make a choice in lenses.
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!
apo, k-mount, lens, pentax lens, sigma, sigma apo, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is the APO version of the Sigma 70-200mm F/2.8 EX DG OS HSM worth the higher price? DBZFYAM Pentax SLR Lens Discussion 24 12-23-2010 12:44 AM
Nature Penny Cat (Sigma 70-300mm apo test) FruitLooPs Post Your Photos! 3 11-16-2010 01:01 PM
K-x: 55-200mm kit lens vs Sigma 70-300mm APO lens ChopperCharles Troubleshooting and Beginner Help 9 01-19-2010 10:16 PM
Sigma 170-500 mm f/5-6.3 APO Aspherical AF Lens Darius4522 Pentax SLR Lens Discussion 2 10-15-2009 07:39 PM



All times are GMT -7. The time now is 07:51 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