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04-24-2016, 06:47 PM   #1
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Pentax FF lens

Well I'm planning to buy K-1 with two lenses: 28-105 and 77 but I can't buy them together so I'm planning to buy one by one. K-1 will be the last one. Currently, I have K-5 and Canon 5d mark 2 or 3 from college. Investing new lenses and camera are quite hard due to the price(But thankfully, Pentax K-1 came out really cheaper than 5d mark 3 and D810). My plan is to buy either 28-105 or 77 step by step to prep for K-1 later. Canon can use Pentax lenses with the adapter easily. K-5 can use both lenses too. Any though about this plan?

04-24-2016, 06:53 PM   #2
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The 28-105 is certainly likely to be more versatile as a first lens, but you can't go wrong with a nice prime like the 77. Tough choice!
04-24-2016, 06:57 PM   #3
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QuoteOriginally posted by MarkJerling Quote
The 28-105 is certainly likely to be more versatile as a first lens, but you can't go wrong with a nice prime like the 77. Tough choice!
That's what I'm thinking. 77mm is a great lens I think. 50 is too wide and 85 is too telephoto.
04-24-2016, 07:06 PM   #4
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I would not say 50's too wide. It depends what you're shooting. This morning, for instance, I set out with the 35-70 thinking that would be plenty wide enough - but I had to change to the 18-55 and I could not move further back!

04-24-2016, 07:14 PM   #5
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QuoteOriginally posted by MarkJerling Quote
I would not say 50's too wide. It depends what you're shooting. This morning, for instance, I set out with the 35-70 thinking that would be plenty wide enough - but I had to change to the 18-55 and I could not move further back!
Well, I used Canon 50mm f1.2 but I have to come quite closer to shoot portrait. I tend to shoot headshot mostly but I prefer closer with telephoto. 40mm would be the alternative lens for that.
04-24-2016, 07:35 PM   #6
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I think the 77mm will work nicely for portrait shooting.
04-24-2016, 07:51 PM   #7
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QuoteOriginally posted by rlatjsrud Quote
Canon can use Pentax lenses with the adapter easily.
I think you may find this is not the case with Canon FF bodies. The aperture actuator on K-mount lenses may (will?) interfere with the mirror travel. There are also potential issues with M42 lenses having prominent rear elements. The mutilation of innocent K-mount lenses to allow use on Canon FF bodies is a frequent source of horror for the Pentax faithful.

OTOH, the mirrors on crop format Canon bodies are shorter and with those cameras, K-mount lenses may be freely adapted.


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04-24-2016, 07:52 PM   #8
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I think your plan sounds fine. For sequence, first get the lens that you believe you use for the type of images you do most. If think it could be the 77mm Ltd (e.g. for portraits) don't worry about the fact that it is a single focal length. It really is one of Pentax's most special lens. If you think a general coverage zoom would be most useful the go for the DFA 28-105mm first. Initial impressions seem very good for an FF kit zoom. It likely decent at portraits also, although I haven't seen samples to prove that yet.

Take note about what Steve cautioned regarding the Canon FF applications.

04-25-2016, 04:42 AM   #9
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The 28~105mm is the no-argument more versatile lens. The 77mm is, as noted above, a focal length intended for portraiture. If that is was you intend to do primarily or entirely, go for it. But if you intend to do more general photography - walkabout, scenics, people, maybe some close-ups, family, vacation - the 28~105mm is absolutely the better choice for a first lens.
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