New Limited Lenses on a *istDS?


Mac

Link Posted 12/05/2013 - 12:51
Hello everyone.

I have a *istDS, and am using a collection of older M42 and K Mount lenses.

Reading reviews of the newer Limited lenses, I gather that their Auto Focus is achieved by a physical drive connection to the camera body.

Is this connection the same as what was around in the olden days of 2004?

I'm thinking of a 21mm Ltd, and won't mind manually focusing if necessary.

Thanks for your help.

Happy Sunday!
Mac from Montreal

SP, SPII, SPF, PZ-10, P30, SFX, K110D, istDS, Optio 60, Z-10, H90, RZ10, I-10, f3.5 28mm, f1.8 55mm, f1.4 50mm, f3.5 135mm, f2.5 135mm, f4 50mm Macro, f4.5 80-200 F, f4 35-70, f3.5 28-80, f3.5 35-135, f3.5 18-55, f1.8 31mm Ltd., two Auto 110's, Auto 110 lenses and filters, tubes, bellows, Manfrottos and a sore back.

johnwhit

Link Posted 12/05/2013 - 13:00
Yes it certainly is.

John
PPG link

In LBA hiatus.

johnriley

Link Posted 12/05/2013 - 13:02
AF has been via screw drive from the camera motor. This is still that same today as it was in the first Pentax AF SLRs.

What has changed is the new SDM system, where the motor is in the lens. Most lenses are still dual AF, so will work with both systems. The limitation is that if you have an SDM-only lens then it won't work on anything older than a K10D with firmware 1.3. It can still be manually focused though.

The 21mm Limited will AF on your *istDS without problems.
Best regards, John

johnha

Link Posted 12/05/2013 - 13:06
Although the 'olden days of 2004' are quite modern considering the screw drive goes back to the SFX from 1987
PPG Flickr

Mac

Link Posted 12/05/2013 - 13:07
John, John and John,

Thanks so much for putting my mind at ease!

Now I can consider the Limited's and re-mortgage the house.

Drooling over the 15mm.

Cheers!
Mac from Montreal

SP, SPII, SPF, PZ-10, P30, SFX, K110D, istDS, Optio 60, Z-10, H90, RZ10, I-10, f3.5 28mm, f1.8 55mm, f1.4 50mm, f3.5 135mm, f2.5 135mm, f4 50mm Macro, f4.5 80-200 F, f4 35-70, f3.5 28-80, f3.5 35-135, f3.5 18-55, f1.8 31mm Ltd., two Auto 110's, Auto 110 lenses and filters, tubes, bellows, Manfrottos and a sore back.
Last Edited by Mac on 12/05/2013 - 13:08

Mac

Link Posted 12/05/2013 - 13:09
johnha wrote:
Although the 'olden days of 2004' are quite modern considering the screw drive goes back to the SFX from 1987

And guess what camera body I still have in my collection?


Mac from Montreal

SP, SPII, SPF, PZ-10, P30, SFX, K110D, istDS, Optio 60, Z-10, H90, RZ10, I-10, f3.5 28mm, f1.8 55mm, f1.4 50mm, f3.5 135mm, f2.5 135mm, f4 50mm Macro, f4.5 80-200 F, f4 35-70, f3.5 28-80, f3.5 35-135, f3.5 18-55, f1.8 31mm Ltd., two Auto 110's, Auto 110 lenses and filters, tubes, bellows, Manfrottos and a sore back.
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