I have seen it written before that we should firstly choose the lenses we need, or want .... And then buy a camera that they go onto!

That seems to be the way this thread has gone. It's probably an approach more suited to professionals I feel ......as an enthusiast I find it hard to break away from the "DSLR System" approach, where we choose a system (brand) based on a number of general qualities, and then find the lenses that serve us best within that system.

That's why I still wonder whether a 600mm lens is truly a necessity for the OP, given the cropping potential of the K3 sensor. The Sigma 50-500 is fairly easy to find for Pentax isn't it? The cost of the longer zoom has to include the other camera body as well, plus the inconvenience and extra effort to gain experience with a new DSLR system.

You've got a K3 ..... Do you know how much of a crop you can do with that sensor and not have any significant loss at the output sizes you use? ..... Do you really need 600mm...?

Sure, but you have to budget for a Nikon or Canon DSLR as well.

Yes, well hopefully the other David will drop out now, making things much easier, David....

Come on LittleSkink! This is the Flash Forum...… lets see some of the shots you took with that interesting sounding lighting set-up. Even if they're not sharp it would still be very interesting to see the sort of lighting you created, and a worthwhile comparison to the other non-flash shots here.

Thanks Gajan

Seems to be false hope ….. a quick look at SRB only shows me Canon FD to Pentax K adaptors. This is an EOS system lens isn't it? Even the adaptors for the ancient FD lenses show no auto aperture or metering control.

balsembi, what is it that made you think this was possible? Have you seen something specific?

Manual everything? Would there be any aperture control with a modern "contemporary" series lens?

Surely it's a complete non starter on a Pentax DSLR .....

The most common lens related complaints we hear is that Sigma and Tamron don't make their lenses in Pentax fit any more.

If there was an adaptor possible then there'd be no need to complain.

There's no such adaptor as far as I understand...... Forget that lens, or get a Canon camera to go with it.

Thanks Al !