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Forum: Pentax News and Rumors 09-30-2018, 12:48 PM  
46 min Interview with Ricoh's Mr. Baus (in German) from Photokina 2018
Posted By gylfimag
Replies: 239
Views: 14,295
Whatever Pentax releases to celebrate the first 100 years should obviously not be called Pentax LX. That was how they celebrated the 60th anniversary (released in 1980 even if the anniversary was in 1979!). The appropriate model name for the 100th anniversary would be Pentax C.
Forum: Pentax SLR Lens Discussion 09-28-2018, 08:38 AM  
24-70 alternative lens for K1
Posted By gylfimag
Replies: 43
Views: 2,081
The DFA 28-105 is a very nice lens, good IQ and far less bulky than any 24-70 f2.8 lens for Pentax. If you need something a bit wider and brighter there are a few options, including Pentax's own 24-70 f2.8 and two from Sigma. The Pentax lens is apparently quite good but the most expensive option. I have the older of the two Sigma lenses, with screw-drive rather than HSM. Bought it used for roughly one third of what a brand new copy of the Pentax lens would have cost me. It is a very nice lens and frankly I don't notice any obvious difference in image quality between it and the DFA 28-105. The main drawback compared to the DFA is that the Sigma lens is considerably bigger and heavier. It also does not have WR. The screw drive works well enough and even if the more modern focusing systems, like the one in the DFA 28-105, may be a bit faster, in practice it is easily fast enough on a K-1 body. So, I use both lenses a lot, pick the Pentax one when I want a light package (still something like 1.5 kg, camera+lens) or need WR but the Sigma for low light or when I need 24 mm. There is a considerable difference between the field of view at 24mm and 28mm. Another option is to buy something like the FA 35 to complement the DFA 28-105. That gives you a moderately wide lens with an f2.0 maximum aperture which helps a lot in low light, when the relatively slow maximum aperture of the DFA lens is a problem. I find that duo quite practical. The FA 35 is a very nice lens and quite light and compact and not too expensive (plenty available used as it has been sold since the film era).
Forum: Pentax SLR Lens Discussion 07-16-2018, 04:55 PM  
Why would somebody buy the DFA28-105?
Posted By gylfimag
Replies: 104
Views: 3,824
The D FA 28-105 is optically fine and it is probably hard to tell the difference between a photo taken with it and most Pentax prime lenses (at least when you correct for vignetting which is its only real weakness, but that is easily dealt with in post-processing). It has WR, a practical zoom range and is not all that bulky. So, if one does not need the wider apertures that primes can offer I see no reason not to buy and use this zoom lens on a K-1. I use it quite a bit and if I am only taking one lens with me it is quite likely my choice. Replacing it with several primes to cover a similar range is just not very practical in many cases - and for that matter, Pentax does not currently offer any prime lens that is wider than 31 mm (and that lens is 17 years old) so to get to 28 mm one would need a third party lens or a discontinued Pentax lens. That said, an APS-c body with a comparable zoom lens will be considerably smaller and lighter. The K-1 (both versions) with a battery and the the D FA 28-105 is close to 1.5 kg, a KP with the 17-70 is about 400 g less (and of course also costs less). So, the APS-c option has some advantages over the full frame option while the latter wins on image quality - although the KP and other recent APS-c Pentax camera will certainly deliver excellent images as well and probably good enough for most purposes. The compactness of many Pentax primes (certainly not the new D FA 50 though!) is not a huge advantage when the camera itself weighs 1 kg so for that reason primes may even be a better match for the smaller and lighter APS-c bodies than the K-1.
Forum: Pentax Q 02-04-2017, 07:32 AM  
My Q-S1 is on its way.
Posted By gylfimag
Replies: 44
Views: 3,727
A normal lens has a focal length that is equal to the diagonal of the sensor. For full frame that is 43.3mm and for APS-C 28.2mm. For the Q-S1 and Q7 it is 9.3mm, for the Q and Q10 normal would be 7.7mm. So 8.5mm is pretty close to normal and certainly not ultra-wide. A normal focal length lens is generally the simplest one to produce and thus they are usually inexpensive and perform well optically.
Forum: Photographic Technique 01-15-2017, 08:46 AM  
Harvard Has a Free Online 12-Module Digital Photo Course
Posted By gylfimag
Replies: 6
Views: 1,372
The course that the original post refers to is hosted at Alison. It is videotaped in 2009 and some of it is pretty dated, especially the discussion of the latest equipment (mainly Canon btw.). You can watch the videos from the 2015 version of the course on the course website at http://digitalphotography.exposed/ Although it seems to be more or less the same material with the same instructor the 2015 videos are of much better quality and you can watch them directly on Youtube instead of the Alison system (which is full of ads and frankly not very nice).
Forum: Welcomes and Introductions 05-20-2014, 12:28 PM  
Hey ! I'm upnorthoryou
Posted By gylfimag
Replies: 6
Views: 476
Welcome (from even further up north)!
Forum: Pentax K-01 12-02-2012, 04:25 PM  
Just got my k01, first impression
Posted By gylfimag
Replies: 18
Views: 3,744
Got my K-01 last week. Finally upgraded my aging *ist DL. I was going to get a K-30 but the price reduction on the K-01 made me change my mind.

Some early observations. More or less in line with what others have found, I reckon.

The image quality is excellent. High iso performance much better than the first generation of Pentax DSLRs. Probably at least a 3 stop difference, with iso 6400 being similar to iso 800 on the DL. Dynamic range also much improved. 16 megapixels is however far more than is needed for most practical purposes, 6 megapixels are plenty.

Video is surprisingly good. It will take some practice to get focusing under control though (no continuous AF). Audio quality is not terrible, the built-in microphone being fairly reasonable. I only had a problem when videoing a scene in a quiet room, then you could clearly hear that the camera produces a fair amount of white noise on the audio track. Annoying but can be filtered out in software. This is apparently not a fault of the built-in microphone as I got the same result with a good external microphone.

The camera handles very well and feels quite solid. The buttons are easily accessed (I don't see the problem some have with the green button) and the menu system fairly logical. The right hand side door or flap is not an example of brilliant engineering but once you figure out that to close it you have to slide it in it works well enough. Has not caused any problems for me.

The rubber texture of the camera helps provide a good grip. It is actually a better solution, being less slippery, than the hard plastic that is usually used for DSLRs.

Pentax apparently rushed the camera to market as the initial firmware was simply not good enough when it came to controlling focusing. With 1.01 focusing is however fairly fast and trouble free. Certainly much faster than my old DL. Don't understand why they still ship cameras with the initial firmware.

The 40mm kit lens is an interesting one but mainly due to its small size. Optically it is fine but that's about it. The focal length is a bit too long for a normal lens, the 2.8 aperture not very impressive for a normal prime and it makes a very loud noise when focusing. I see myself using my FA 35 far more than this one (brighter, wider, less noisy, similar IQ and not terribly large).

The camera is fairly fast and responsive. Taking raw photos I never have to wait for the buffer to clear to take the next photo. Burst mode may be rather limited when taking raw photos but when taking jpegs it is fine. The jpeg engine also seems fairly good although I'll probably not use it much.

The camera is somewhat large for a MILC but I don't see that as a problem. Compared to most DSLRs it is quite compact.

Finally - the viewfinder. Having used various Pentax viewfinders for the last 30+ years I don't miss having one that much on the K-01. The LCD is good and usable even from a steep angle. Haven't tried using the camera in bright sunlight or snow though.
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