Pentax K10D lens compatability

Lilly · 2007-01-16T01:21:50+0000

I have the very reliable Z1 body with SMC AF Pentax lenses: 17-28; 28-200; 80-320 and a 135mm 2.8. My question is as I am about to go digital I have been concerned to read comments that using existing non digital lenses with a digital body produces sub standard images ie. soft, restrictions in auto focus, exposure metering.. I checked out the 'Pentax Canada' lens compatibilty chart http://www.pentax.ca/digital/digital_slr/da_lenses/compatibility.php to find that these lenses come under the category 3 which says 'Limited functionality' but does not explain in detail what functions I would be forsaking, I have emailed them and UK office too but after a week they still have not replied to me Has anyone had any experience of this yet, I would like to be sure my lenses will be spot on with a K10D and would hate to be disappointed and dont relish the cost of starting all over, HELP please? :( :?

Pentax Digital SLRsPentax Digital SLRs

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Mongoose Mongoose

2891 posts
19 years
Wiltshire,
England

Posted 16/01/2007 - 21:07 Link

IF stands for internal focusing, in practical terms it means the lens stays the same length when focusing and the front element does not rotate

MattMatic MattMatic

5870 posts
24 years
Sussex,
UK

Posted 16/01/2007 - 22:19 Link

Lilly,
No problem. "IF" is Internal Focussing. Should be quick as anything and absolutely wonderful on the K10D.
My SMC-F 100mm/f2.8 macro is unbelievable on the K10D!!
Matt

Mannesty Mannesty

7650 posts
21 years
Totana,
Spain.

Posted 24/01/2007 - 09:22 Link

Lilly,

IF = Internal Focus which means the filter end of the lens does not rotate when focussing. This has two main benefits, you can use a circular polariser and it won't turn, and you can fit a 'petal' shaped hood rather than a round one.

Peter E Smith - flickr Photostream