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05-07-2017, 08:25 AM   #1
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Anyone using K1 with Sigma 4.5/500?

Couple reviews are available about Sigma 4.5/500 with Pentax APS-C cameras. Is anyone using this lens with fullframe K1? Nikon/Canon version reviews are based on lens stabilized lenses and different camera systems. How does the lens perform with TCs on fullframe? The next Pentax APS-C will probably become my TC.

Not sure whether it makes sense to pump out that much money for a third party lens that is basically discontinued and offered for a system that has no decent long glass available itself, but I like to use a single camera/system and have outgrown my A 5.6/600. Manual focusing on screen is not easy with K1 and screen exchange and shimming is not an option. For APS-C I always got shim kits and adjusted Kazeye screens. Size, weight, length, aperture, AF ... appear perfect for the Sigma.

05-07-2017, 08:41 AM   #2
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I believe @Kameko uses a K-1 + Sigma 500/4.5.
05-07-2017, 09:45 AM   #3
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QuoteOriginally posted by zapp Quote
... and offered for a system that has no decent long glass available itself
The D-FA 150-450 is a pretty decent lens if you can live with 50mm less focal length and a half stop slower aperture at the long end.
05-07-2017, 04:59 PM   #4
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I think Ken Goh is another user, if you look at his birding pics.

05-08-2017, 08:35 AM   #5
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QuoteOriginally posted by alpheios Quote
The D-FA 150-450 is a pretty decent lens if you can live with 50mm less focal length and a half stop slower aperture at the long end.
D-FA 150-450 is a nice zoom for its class. It is definetely another lens to try before making up my mind. As well as Nikon 200-500 which is not weather sealed just like the Sigma. So far I am not convinced that it can replace DA 300 and a A 600 at the same time. When bitching about long Pentax glass, I was thinking about the 5.6/560 mm and the total lack of FF TCs or any 2x TC. Not mentioning the lack of any other large aperture tele lens. I donīt see this as a priority in Pentax land, but the "new" 560 is just missing the point. It scares little birds and is difficult to take on air planes...
05-09-2017, 08:45 AM   #6
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Found the PentaxUser post: Pentax 150-450 F4.5-5.6 vs Sigma 500 F4.5 vs Pentax 560 F5.6
Need to look at beanbag issue with the Sigma and need to consider 150-450 more seriously while keeping the A*600.
05-09-2017, 07:49 PM - 1 Like   #7
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I use it on the K1. It makes for a heavy kit.

What do I think? The focus is good, better than the K3 slightly. I have trouble hand holding the thing, so use a tripod almost always. I got the K1 last fall and have only started shooting in earnest the last few weeks and am still finding what works and what doesn't.

I switch between full frame and crop mode often, gaining a faster frame rate when desired.

I have used quite often the electronic shutter. I find that I can get shots at a distance that are remarkably good. I crop and get good results. I found with the K3 that iso1200 was about the maximum I would go on a cropped shot, I go to 3000 on the K1.

The grip helps balance the thing.

Here are some samples. Many of these are in suboptimal conditions. I like the combination.













05-17-2017, 02:00 AM   #8
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Hello,
I am also using Sigma 500/4.5 on K-1. It is a good combo. A bit on heavy side.
The only my complain is that the central focusing point of K1 is a bit too large and thus when focusing on a bird in a forest - camera tends to focus on leaves or branches rather than bird. So, I have to switch to one of the side focusing points next to the central one.
Yuriy


Last edited by yurko_yr; 05-17-2017 at 02:08 AM.
05-22-2017, 10:38 PM   #9
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QuoteOriginally posted by zapp Quote
When bitching about long Pentax glass, I was thinking about the 5.6/560 mm and the total lack of FF TCs or any 2x TC. Not mentioning the lack of any other large aperture tele lens. I donīt see this as a priority in Pentax land, but the "new" 560 is just missing the point. It scares little birds and is difficult to take on air planes...
zapp, I went thru the same problem. Lack of modern long prime super sharp lenses. Sigma dropped Pentax in new 500mm f/4, Tamron is even worse for Pentax mounts. Pentax doesn't even make anything longer than 300mm in prime lenses for FF. I can understand why, Ricoh is simply focusing on landscape and portrait photography. That is were it is superb.

Now far as Pentax 150-450mm with K-1. I used it shortly before I sold all my Pentax gear. Lovely combo. Sigma 500mm f/4.5 is great lens also. The zoom lens can be handy and also 150-450mm is weather sealed.
I would go for Pentax 150-450mm and keep the SMC *A 600mm f/5.6..that is awesome lens for perched shots.
05-28-2017, 10:31 AM   #10
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I will rent a 150-450 and keep having fun wth the 600 - as well as the tiny DA*300.
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