 Posted: Sat Mar 28, 2009 6:36 am Post subject: Cosina 75-300/4.5-5.6 PK mount - rescued from destruction |
 |
|
luisalegria wrote:
I picked this thing up for nothing, as it was broken and came with another lens. I thought I might disassemble the thing and use it for the mount or helical, to mount other lenses.
It looks like someone used it a very great deal indeed. Its worn all over, and the lettering is completely worn off in spots.
It is broken, the stop-down mechanism in the PK mount doesn't work, so its just a full manual lens. I'll see if I can repair it.
However ! As a manual lens it does work very well ! After trying it out I can't bring myself to use it for projects.
Its a very close-focusing lens (as usual for later zooms), going down to 5ft/1.5m, which is very useful for a 300mm. "Macro" on this thing is just a matter of focusing closer. The helical is quite smooth and responsive. It "creeps", but I was using the thing at 300mm only anyway. And being manual aperture, I can use Av mode on the Pentax. Its also very light, but quite sturdy. Its no strain carrying it.
This is a perfectly sharp lens, reaching the limits of my sensor wide-open, at f/5.6. No problems with contrast or flare and not a trace of CA or color fringes. In other words, this "free", "parts or repair" zoom lens may be one of my best 300mm.
The bird -
crop -
_________________
I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
Search
Memberlist
Register
Profile
Log in to check your private messages
Log in
