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03-13-2014, 10:21 AM   #1
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HI

Hi, Im a new member in Cape Breton Nova Scotia. Im currently interested in finding a fast prime telephoto lens along the lines of a DA300, but would prefer a 400mm around f2.8.I have a K5. Im also wondering about lenses from other formats fitting on my K5.

03-13-2014, 10:38 AM   #2
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Welcome!

The only 400 f/2.8 is this one: SMC Pentax-A* 400mm F2.8 ED [IF] Reviews - A Prime Lenses - Pentax Lens Reviews & Lens Database Quite hard to find and manual focus of course. There is an AF 400 f/5.6:SMC Pentax-FA* 400mm F5.6 ED [IF] Reviews - FA Prime Lenses - Pentax Lens Reviews & Lens Database

By other 'formats' do you mean 645 and 6x7 or do you mean other manufacturers? There are adapters to K-mount from 645 and 6x7 but everything will be manual.
03-13-2014, 10:55 AM   #3
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HI thanks the FA 400mm seems like the better choice for me.I believe anything in the 6x7 or645 would need adapters and be manual focus is that correct?
03-13-2014, 11:02 AM   #4
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QuoteOriginally posted by Rmirabay Quote
I believe anything in the 6x7 or645 would need adapters and be manual focus is that correct?
That's correct. In general, if you already own that glass it might be worth using an adapter but in my opinion it's not worth buying the glass for adapted use as there are other alternatives.

Possibly the most highly recommended long prime is the Sigma 500mm f/4.5 Sigma 500mm F4.5 EX DG APO Lens Reviews - Sigma Lenses - Pentax Lens Review Database

You might also be interested in this thread: https://www.pentaxforums.com/forums/122-lens-clubs/55946-300mm-plus-lens-club...ng-lenses.html Lots of pictures but all with long glass so if you want to see what others are using that's the place.

And here is the link to the lens database: Pentax Lenses - Pentax Lens Reviews & Lens Database You might browse through and see if anything else looks interesting. Unfortunately Pentax does not have a lot of choices in long fast glass at the moment.

03-13-2014, 11:11 AM   #5
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Welcome aboard! You might find the new teleconverter of interest, I'm looking forward to seeing a review of it with the DA300 myself...though it would blow my allowance for the year to buy both, I think.
03-13-2014, 02:58 PM   #6
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QuoteOriginally posted by Rmirabay Quote
in Cape Breton Nova Scotia
Welcome to the forum from the Highlands of 'Old Scotland".
03-14-2014, 01:03 PM   #7
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Welcome to PF and bonjour from France, Rmirabay ... hope to see some K-5 images soon ... Salut, J
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