Give me primes any day, I have a 18 - 250 zoom which is very handy covers the whole range I need, But then I bought a 30+ year old SMC K 200mm f4 and am now not as happy with the zoom,When you think this Zoom cost about £300 and the average price of a new prime lens must be around £500 WHAT are you getting for £300 certainly not the same image quality. I now have
SMCP M 20mm 4.0
A 50mm 1.7
M 100 2.8
A 135 2.8
K 200 4.0 and I LOVE them, try one and your hooked.

[quote=
Except that at 1/6s, there's no narrow slit - the whole of the frame is exposed.



[/quote]Right ,But the shutter is still exposeing the top of the picture first is it not.Regards.Spill.

I think its owing to the way the focal plane shutter exposes the top part of your picture first and comes down to the bottom to finish, just like a narrow slit moving down, SO the bottom of the wheels have moved across the screen as the shutter has moved down.Regards.Spill.

I can only give SRS Microsystems 10/10. for Prices. Availability.Speed of delivery.Will certainly deal with them again.Jessops were ok but didn't have a K20D available.but they are very good if you need to take anything back .Super Forum by the way.