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SMC Pentax-A* 1:4 300mm
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PostPosted: Tue Jan 24, 2012 5:42 pm    Post subject: SMC Pentax-A* 1:4 300mm Reply with quote

Just received a mint copy of the SMC Pentax-A* 1:4 300mm, exchanged for my SMC Pentax-DA* 55mm f/1.4 SDM. Yes, I swapped an AF lens for a MF lens Cool

It does not feature ED glass, but from what I've seen on the web it's very good optically. And apart from the big front element it's actually quite short, so it easily fits in my normal photo bag.



PostPosted: Tue Jan 24, 2012 7:48 pm    Post subject: Reply with quote

I've actually seen an enlarged image taken with the 300/4 at a library show. The image
was pretty large, and yet the crispness was TRULY evident, even in the corners. I hope
this lens gives you the same results. Would love to hear and see how it works for you. Smile


PostPosted: Tue Jan 24, 2012 8:12 pm    Post subject: Reply with quote

Thanks Laurence! Are you sure it was the K-mount version of this lens? There is also the A* 645 300mm f/4 so I'll ask you just in case Smile


PostPosted: Tue Jan 24, 2012 9:28 pm    Post subject: Reply with quote

Congrats! Great design , very short and seems not so heavy also.


PostPosted: Tue Jan 24, 2012 10:06 pm    Post subject: Reply with quote

Very, very small for the spec.
Not cheap either, sadly for me.


PostPosted: Tue Jan 24, 2012 10:43 pm    Post subject: Reply with quote

Thanks!

BTW, Pentax never claimed it but based on the star designation and its very short design I and a few others suspect that the lens actually uses ED elements. It's also fairly unresponsive to CA and PF. What do you think?


PostPosted: Tue Jan 24, 2012 10:57 pm    Post subject: Reply with quote

Spotmatic wrote:
Thanks Laurence! Are you sure it was the K-mount version of this lens? There is also the A* 645 300mm f/4 so I'll ask you just in case Smile


He was using it on one of the Pentax DSLRs...I THINK it was a K5 model, a fairly new model.

Larry


PostPosted: Wed Jan 25, 2012 6:22 am    Post subject: Reply with quote

Go out and use it! This is quite a rare lens, am i right?


PostPosted: Wed Jan 25, 2012 6:48 am    Post subject: Reply with quote

Of course I will use it, thank you! Smile

It's not super common, but not super rare either. There are a few on eBay at the moment, mostly by the usual "golddigger shops".


PostPosted: Wed Jan 25, 2012 7:02 am    Post subject: Reply with quote

BTW, based on this PDF documentation (with lots of K-mount lenses) the M* and A* 300mm f/4 really featured ED glass. In the case of the A* it's even part of the name as shown.

http://fockert.xs4all.nl/~pentax/catalog/05_Objectieven_Filters_Adapters.pdf