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Showing results 1 to 9 of 9 Search: Liked Posts
Forum: Pentax News and Rumors 11-08-2013, 08:16 PM  
Minor Roadmap Update- TC is now HD
Posted By dadipentak
Replies: 50
Views: 12,498
I hope they get that TC out soon---there are some unicorns I want to photograph.
Forum: Pentax News and Rumors 10-04-2013, 10:11 PM  
K-3 pictures: front, side and back (aka it definitely is a headphone jack)
Posted By mee
Replies: 636
Views: 98,472
The [1][2] at the lower, right corner of the back view of the camera.. does that indicate dual slots?
Forum: Pentax News and Rumors 03-26-2013, 11:09 PM  
A message to RiceHigh (or whoever) re the K-3
Posted By Racer X 69
Replies: 25
Views: 7,292
I said it before in another thread.

Many people are very passionate about this full frame thing, and seem to have an interest in expending huge amounts of time and resources discussing and arguing about it.

Sheesh!

I have better things to do with my time, like take pictures, sort through and develop the good ones, print some of those, and post a few too.

Oh, yeah, and I have to squeeze work in there somewhere too, 'cause I need money for my bad photography habit. That's my story and I'm stickin' to it!
Forum: Pentax SLR Lens Discussion 03-11-2012, 10:16 PM  
Sigma, Pentax or Samyang?
Posted By walter
Replies: 20
Views: 4,560
I have all three, but haven't used the samyang much since I've only had it a few weeks.

Pentax 10-17 : I don't use this much any more, and now that I have the rokinon 8mm, I should probably sell it. It has quite bit of CA, and it isn't very sharp. It's a fun lens to use, but image quality isn't very satisfying.

Sigma 8-16 : It's pretty big and heavy. The image quality is pretty good, CA isn't bad (actually pretty good for a lens this wide) and the center is sharp. I wish the corners were sharper though. I'd go with this lens for architectural shots (because it's rectilinear), but with landscapes it doesn't quite have the look I was hoping for.

Samyang 8mm : Just got this lens so I haven't used it too much. I like the projection though, and I'm looking forward to taking it out backpacking. It doesn't distort as much as the Pentax, and the images don't feel as distant than the Sigma at 8mm.
Forum: Pentax SLR Lens Discussion 03-11-2012, 02:04 PM  
Sigma, Pentax or Samyang?
Posted By northcoastgreg
Replies: 20
Views: 4,560
This is probably correct. I don't have any first-hand experience of the Samyang, but the DA 10-17 is not particularly sharp (although it's adequate for most purposes). The 10-17 is very weak on CA (although most of the CA can be significantly reduced in post). What the DA 10-17 has going for it is superb flare control and light transmission, leading to images with rich, vivid color and excellent micro contrast.
Forum: Pentax SLR Lens Discussion 03-09-2012, 11:29 PM  
Sigma, Pentax or Samyang?
Posted By Laurentiu Cristofor
Replies: 20
Views: 4,560
You mean, like this? :)



This is the Samyang.
Forum: Pentax SLR Lens Discussion 03-09-2012, 09:54 PM  
Sigma, Pentax or Samyang?
Posted By olenl
Replies: 20
Views: 4,560
The proper fisheyes have 180 degrees diagonal view angle. In rectilinear projection, it is impossible to achieve this view angle so no matter what the rectilinear focal length is, it's always not as wide as fisheye.

Also, extreme wide rectilinear lenses produce unpleasant (for my liking) distortion effects near borders, where objects are stretched along radial direction and thus look unproportional. I think 12mm (cropped) is more than enough for wide angle, in fact even 15mm seems too wide for me, but maybe it's just me...

Anyway, about the 10-17 and 8mm lenses. As I said in another thread, the 8mm is a one trick pony - it's only good if you want to shoot the surroundings without focusing on particular object - the resulting shots are sharp across the frame, and the projection is such that no part of the frame has significantly changed proportions of objects. Also note that 8mm has pretty distant minimum focusing distance which augments the fact that it's not as good as Pentax 10-17 if you want to put an accent on some particular object.

Pentax 10-17mm is more traditional projection fisheye - it compresses the objects near frame borders (along radial direction) unlike rectilinear projection that stretches them. This means that central objects are much more detailed than objects closer to the borders. It also has very close minimum focusing distance so you can make artistic shots. Also the zooming ability allows to get shots that look more like rectilinear wide angle at 17mm end which makes it more versatile.

So, if you know you want Samyang 8mm (e.g. you need it to get detailed surrounding shots ONLY), get it. If not, you are more likely to prefer Pentax 10-17mm instead, unless you prefer 8mm's projection.
Forum: Pentax SLR Lens Discussion 03-03-2012, 11:15 PM  
What to get?
Posted By Frogfish
Replies: 16
Views: 2,086
You mean apart from the Kr having a 4 times better resolution (and larger, 3.0" to 2.7") screen (920k to 230k), all focus points visible and selectable as opposed to the Kx's centre point only, one stop better ISO (12,800 - 6,400) and expanded (25,600 to 12,800) or faster fps (6 vs 4.7) ? If those advantages don't have any relevance to your shooting subjects or style then by all means keep the Kx as back-up, otherwise you are giving up quite a bit on your 'back-up' camera (which inevitably becomes your second camera and not just a 'back-up' per se.
Forum: Pentax SLR Lens Discussion 10-14-2011, 10:02 PM  
Polarizing Filter for DA 12-24
Posted By LowVoltage
Replies: 7
Views: 1,712
You can try Spotlight Photo for the same Hoya Pro 1 D filter at about $35 less. I've bought a few filters from Spotlight, and so far it's been a very pleasant experience. Also, Marumi DHG filters are supposed to be a great "sleeper" brand, although you'd probably have to search them out on eBay. Most of the time they are shipped from Hong Kong (but don't let that fool you, they are a Japanese company), but one or two sellers can be found in the States. If memory serves, I think OEC is one seller in Texas. Marumis are low profile, so they don't vignette, and they are multi-coated.

I can tell you, though, the Pro 1 D from Hoya really is a nice balance of build quality, performance, and price. They are a noticeable step up from Hoya's own HMC-labeled polarizers and yet cost about 25-40% less than B+W and other "premium" brands. Another advantage of the Pro 1 Ds are the fact that, in spite of being low-profile (thinner) to avoid vignetting, they still have an outer filter thread which allows you to use your existing lens cap. I have a B+W CPL filter, and it's performance is grand, yet it does not have an outer filter thread. This means you can't use the existing lens cap; you have to use the included B+W cap that is supposed to hug the outer rim of the filter. People regularly complain out these slip-on caps not holding on tightly enough.
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