Will.

If you don´t want to hook your old manual 50mm to your K10D (which I don´t see the reason for not doing) you´re quite able to check this out with your AF 50mm if it has an aperture ring, as this is a problem with the camera and not specifically for old lenses.

My brand new FA 35/2 gets the same metering error results if using the aperture ring in manual mode, but works fine in the A-settings.

// Mats

I get the same metering when stopping down my SMC Takumar 50/1.4 as stopping down my SMC-A 50/1.4 (green button metering or stop down check with the on/off switch) at different apertures (ok at f4). This in M-mode of course.

// Mats

My K10D is accurate at f4, any focal length, so if I want to use the aperture ring I need to dial from there.

I also want to inform you guys that Pentax Sweden has updated the K and M lens info on their lens compability page with "metering errors may accour" (for those who read Swedish);

http://www.pentax.se/index.asp?url=http://www.pentax.se/default.asp?cat_id=416

So it seems like they are not updated/aware that this is NOT related to just K and M lenses, but has to do with the fact that as soon you are using the aperture ring, the camera makes the error. Doesn´t matter if you use the aperture ring on an A or FA lens. Or stop down a M42 lens.

// Mats

I also have this K10D problem. Overexposure at small aperture and underexposure wide open when using the aperture ring. This is NOT just related to older lenses as my brand new SMC FA 35/2 makes the same measuring error when using the aperture ring.

As said above, What were Pentax thinking? They must have recognized this as the green button is there....

I only have manual SMC lenses (six) exept for the seventh, thats the 35/2 and I must say I feel cheated on, as the promo told that whatever K-mount lens there is, it would compatible with the camera. Wrong exposure in a camera made in 2006?

Thanks for the heads up, stevo. I´m aware of the non fixed aperture of thes F and FA lenses from the Bojidar site, but the spec´s on his site doesn´t tell about the macro features on the lenses. So that´s what I was interested in. Anyone?

// Mats

This is a focal length that would suit my purposes too. I´ve seen some lenses on eBay and discovered that the A 70-210 have a macro feature, how about the F 70-210 ?

And would the FA 70-200 be able to compete with those above?

Thanks,

// Mats

Yes, I just figured out that the "J" lenses doesn´t have an aperture ring. So, that seems to leave me with the 80-320.

And now.......off to eBay....

Thanks again guys!

// Mats

Thanks for all the input friends!

Moongoose hit the nail´s head when bringing the analog issue up. I still have my KM and I´d like to be able to use my tele zoom "to be" on the old girl as well. In fact, I have quite a few SMC lenses but none of them are D-lenses.

As for the SMC Takumar, its a great lens. But a bit too tricky to shoot birds and stuff with, sa its a manual focusing lens that requires stop down metering.

Anybody who´s selling an F or FA 300* lens?......

// Mats

Thinking of a tele zoom lens for (outdoors and wildlife) travels with my K10D and I´m concidering these three alternatives:

FA 100-300
FA 80-320
FA J 75-300

Which one would you gor for? Or should I stick with my SMC Takumar 300/4?

// Mats

I´ve owned a couple of SMC 300mm lenses and as stated above, they are really good. My present 300mm is a SMC takumar 300/4 which I also can use on my C/Y mount camera with an adapter. No.I didn´t go for the Zeiss Tele-Tessar 300/4 because I liked this one better.

The M* 300/4 is one of the smallest lenses in its range (in company with the A* 300/4) and once I first saw one I couldn´t belive it was a 300mm lens....
Prices seems to have increased on these gems lately (K100D/K10D effect?) and when finding one, they are almost always over 500 GBP.

BTW, did you see this one? 1800 USD.....

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=012&sspagename=STRK%3AM...