Depending how 'official' he is (i.e. what distribution channels are available to him), your images maybe worth a lot to him. I'd be very wary about giving it up (circumstances differ though), especially if it is related to future sales (assuming there will be some and you trust him?).

Personally I'd only sell copyright outright, and then only if there was a big upfront lump sum involved. Even if I can't do anything with the copyright I don't want to line someone else's pocket.

I take Mark's point, if the pay is good enough and guaranteed, it's a different arrangement.

Hi reso,

Unfortunately I'm not interested in a swap, but I do have an FA 28-80 PowerZoom lens I've been debating whether to sell link

I had decided not to sell it, but let me know if you're interested.

John.

I agree with Bob, long primes are great if you always need the reach, however there are a lot of times I'd like to pull back just a little (and the field of view on APS-C compounds this).

If I was contemplating a DA* 300, my choice would probably be a DA* 60-250 f/4 instead.

I've just spent a frustrating few minutes trying to work out what was going wrong with my pictures. Long-ish exposures (around 1/15th) on a 28mm lens showed signs of shake. Upping the ISO to get 1/60th didn't help and the resulting images showed far more shake than I'd experienced before. I checked specifically to make sure SR has ready before shooting.

Then I realised my focal length had been set to 500mm yesterday and I hadn't changed it - oops...

Having spent some time looking at this on a camera, the aperture is definitely sticky and becomes more of a problem at smaller apertures (the green button doesn't stop the lens down completely before it re-opens it after metering). The stop-down switch around the shutter release will stop it down completely.

Reduced to £35 with UK postage, bank transfer or cleared cheque.

John.

Taken off sale because I'm starting to explore using it on my KA mount.

I don't see a tripod mount either on the bay.

Steam loco 'John Howe' crossing the swing bridge at Riversway. One of the exhibits at the Ribble Steam Museum link:



John Howe crossing swing bridge by John Halliwell, on Flickr

Pentax K-5, SMC-M 28mm f/2.8, shot 30th June 2012.
Manual mode, 180th/sec @ ISO 160.

I know that, but the apparent magnification you get is changed from 10x to 15x. This means that you need a faster shutter speed to compensate for shake than you would need for film as the same lens movement creates more image movement.

It looks like the Sigma 'DG' tag suggests these lenses cover the full frame, can anybody confirm this applies the Pentax mounts?