Actually - £95 + PnP

I love turning noisy colour images into BW shots. I'm from the wrong generation to have enjoyed the heyday of film BW grains but even this digital noise is fun to use.

That third image has such a lovely balance to it. The texture in the sky is a winner.

Excellent little zoom lens with full frame coverage. Good sharpness. Excellent condition with minor markings.

Comes with carry case, caps and hood.



















Looking for £160 + PnP

2 and 7 are really good!

The others fill the frame a little too much so I see your point about the TC!

Very nice set!

The TC is quite an underrated bit of kit.

The SR input needs to be the true FL of the lens, no matter the sensor size.

300mm on the Q7 can be mental!

I think the idea is the 'effective FL due to crop factor' (which is more FoV, not true FL as mentioned above) directly impacts the shutter speed needed to avoid motion blur.

As a rule of thumb, using the effective focal length in this way is useful.

I wouldn't treat the 45mm telephoto end of the Q 06 lens as a 45mm for anything other than calculating depth of field and quality of smoothness for OOF areas. In most ways it behaves like a 250mm lens on the Q7, including the shutter speed needed to avoid blurry images.

Now back on topic, have you honed in on the perfect AF fine adjustment for the long end of your lens/TC combo? You can potentially raise your focus hit ratio from 5% to something much higher.

With AF adjustment off, the sharp images are the ones where the lens has accidentally picked the correct focus distance. With Pentax AF that's still frequent enough to make you think the adjustment is fine. Once you've adjusted it, the majority of shots will nail focus, with a bit more than a handful missing focus.

I've recently picked up this lens as a bit of a gamble, not knowing its previous condition. It's one of the more freakish lenses available on the system, being such a long telephoto at f/5.6.

It was well used and the optics had fungus in a number of elements. The front and rear elements were easy to access and were simple enough to clean but there's a focusing group that requires a crazy amount of disassembly so I left that well alone.

The IQ is a mixed bag at f/5.6, with a bit of softness visible at longer distances. By f/8 and f/11 it's very decent.

Most of these images were shot at f/8 (TAv, 1/1000 or so). I've not done birding and planespotting before so this is a new area. Comments and criticism welcome.

Resident wood pigeon:



Possible Kestrel/Sparrowhawk, very high up!



Some kind of seagull:



And a bunch of planes!

There's only so much a brazilian boot lift can do for you.

Recently picked one up as a bit of a beater lens. It's been through tough times and has fungus on almost every single element.

You'd never notice it though, looking at the images it produces. This thing is ridiculously sharp. I've got half a mind to strip down and clean but the glass is perfectly aligned and there's no point messing around with it.