I'll take advantage of mugs who advertise photography gear with bad photos and poor descriptions when the item is cheap, that way if you get burned it's not the end of the world.

Don't think I'll be buying this one though. Never risk more than you can afford to loose

and yeh the chorus of cries goes up once more

www.srsmicrosystems.co.uk

Does mean travelling to Watford if you want to try before you buy though, depending on where you are this may or may not be a problem.

the format a lens is designed for has no impact on its focal length, a 19mm lens is a 19mm lens whether it's being used as an ultra wide on a 35mm film camera, a sensible wide on APS-C or a moderate wide on 110.

The only thing which changes is the image circle the lens projects. Since the DA 18-55 is designed for APS-C cameras, it produces a smaller image circle than that Cosina, but as you are using it on an APS-C size DSLR this will have no impact.

that lens will certainly be no better than the DA 18-55, and probably quite a lot worse.

If you didn't get an 18-55 with your camera then I would suggest a trip over to

http://www.srsmicrosystems.co.uk/index3.asp?id=65&section=%3Cfont+size%3D4%3...

where you will find a brand new DA 18-55 for the princely sum of £69.


The only advantage that Cosina has is full frame coverage, but unless you are planning to use it on a film camera this wont be an issue, and the 18-55 more or less covers full frame from ~24mm onwards anyway.

one down, 500 or so to go (your mileage may vary depending on your current target lens)

I think obsolete is a little strong Peter, most of the manual is still correct.

I agree that it's nice to have it in paper form but TBH I wouldn't pay more than £5 top whack (including P&P)

Good luck with your sale, but don't expect too much.

yes but the lens he's talking about is a Prime, therefore cannot have power zoom, I have heard people make the mistake of referring to SDM/HSM as Power Zoom before hence my question.

not to mention I don't think anyone has produced a new lens with Power Zoom in best part of 10 years.

when you say power zoom, do you mean HSM focus motors? (these are not the same thing)

The Pentax SDM lenses will be able to be driven from the screw drive, but I'm not sure about hypothetical future Sigma HSM lenses. In any case, last I heared Sigma don't think there are enough SDM/HSM capable Pentax bodys out here to bother with it yet.

Also since Sigma always reverse engineer everything, they wont be able to bring out HSM in PK mount until a month or so after they can get their grubby mits on a Pentax lens with SDM.

Perhaps that's why the new batch of sigma lenses are delayed? they are waiting for a DA* lens to copy?

Didn't Chris of SRS fame mention a while back that Sigma were going to be expanding their PKAF range somewhat in the near future?

I can't remember exactly which lenses he said would be included, I remember the 50-150 F2.8 was one of them because that one interests me if it becomes apparent that I will never be able to afford/justify a DA* 50-135

I think I just made a biiiiiiig mistake


I just tried putting the Pentax D-FA 50mm F2.8 macro which I bought for my research lab on my personal K10D.

It has just taken all of my will power to take it off again.

Want One NOW!!!!

more accurately I want the 100mm version assuming it is built to the same standard. It's a good thing I got the 50mm for work or I might be on the run with it right now.

The focusing clutch works both ways so the ring doesn't rotate when it autofocuses, the whole thing is just a masterpiece!


Let this be a lesson to all of you, never try out a lens you can't afford!

PS thanks to Chris@SRS for great service and a fantastic product, I just hope I can bring myself to keep it in the lab!