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10-05-2016, 05:25 AM - 1 Like   #16
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QuoteOriginally posted by reverendray Quote
With the yet to be fleshed out FA lenses for the K-1 that I bought, does anyone know of an adapter that would allow for the use of FX nikon or EF canon mount lenses on the K mount? There does not (I think) need to be an optical adapter when looking at the barrel lengths in the lenses. I could be totally wrong but......

There are a lot of used good Nikon and Canon lenses out there for much less that the 1400 bucks for the 15-30mm Pentax lens in that same range.

Why not just buy a Nikon body?

10-05-2016, 06:18 AM   #17
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QuoteOriginally posted by Wheatfield Quote
Why not just buy a Nikon body?

Did try that. Purchased a d7100 specifically so I could use a Tamron 150~600mm during a trip to Iceland. Got many fine images, better (IMHO) than I could have gotten with my Sigma 50~500mm and K3. BUT, the Nikon never felt right in my hands. The controls were unfamiliar, not intuitive, and I constantly had to check carefully what to do to change a setting. So both the d7100, an 18~140mm Nikon (very good lens) and the Tammy have gone to an acquaintance who is a Nikon user, at a $ loss to me, but I figure that's "rental" for having the lens for several weeks in Iceland. (try renting a Pentax 600mm f4, 250-600 f5.6, or even a 600 f5.6)
Been using Pentax too, too long (since the late 1950's = before either Nikon or Canon had released their first SLR), and 1) I really don't want to be carrying two camera bodies; and 2) I don't want to change over 100% to either Nikon or Canon considering the very large collection of Pentax equipment I now own. A crop from the Pentax 150~450mm has almost as good IQ as the 150~600mm Tamron @ 600mm, and I have the Nikon 600mm mountable on the K3 or K1 if I want to do location shooting of small birds (it isn't good as a carry-along, just-in-case lens, but it's great if there are birds here and a tripod location nearby to sit and wait, or sometimes for shooting from a car-as-blind)
10-05-2016, 05:22 PM   #18
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QuoteOriginally posted by WPRESTO Quote
BUT: There are lenses from other manufacturers that are, frankly, superior to Pentax optics of the same FL, and some are more readily available. I obtained a Nikon 600 f5.6 EDIF in excellent condition for under $1000. The 600 f4 Pentax is superior, but try to find one and wince at the price. I've never seen a Pentax 600 f5.6 for less that $2000, and the Nikon has IQ at least as good if not better. BTW: I use it with a no-lens adapter that does not permit infinity focus, but it's primarily a birding lens, so it is never used at anything close to infinity and the adapter permits a bit closer focus. I leave the lens @ f8 so it is used as you would use a 500mm f8 mirror lens. There's a slight gain in IQ over f5.6, but there's no detectable additional improvement at f11, and what is gained in DOF at f11 is offset by requiring a slower TV, critical with such a long lens and birds as a subject.
QuoteOriginally posted by Nass Quote
Yes I do think some of those long fl Pentax lenses are very expensive, more so than other brands. That's the downside of Pentax being a small player.This has gotten worse in the last couple of years unfortunately. It's a bad thing.
QuoteOriginally posted by WPRESTO Quote
BTW - V-A-V The 600mm Nikon. A downside is the color rendition, which is odd. JPEGs look a bit muddy and flat, which can be corrected within limits PP. I must experiment with RAW capture and see if I can devise a PP color profile that will make the images "snappy," or find a camera custom color balance spot to replace AWB.
While I don't disagree and you will find in the sample image archive a post by me of a nikkor 300/4.5 converted to k mount I have to point out that the op was asking about a 15-30 mm substitute.
10-30-2016, 04:30 AM - 1 Like   #19
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QuoteOriginally posted by Adam Quote
The short answer is that Canon and Nikon lenses can't reliably be used, except for older Nikon lenses.

If you're not happy with the Pentax lens lineup, I'd look at offerings from Samyang or other third-party makers. No sense, IMO, to use a makeshift solution on a $2k camera
I thought about this, being an advanced amateur and making very little money from photography, and this made sense. Further research showed that the Pentax 35mmF2.4 and other DA primes would work for a 120 bucks that exceeded the "kit" lens of 28-105 that was also very sharp. After a trip to Iceland and seeing the results from the 35mm, I am happy to say that there exists enough options out there for me to be totally happy with both the lenses and the camera. Thanks for the quick and succinct reply.

Last edited by reverendray; 10-30-2016 at 04:37 AM.

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