KentG

It comes from almost 50 years of photography, the majority of it with Pentax. Photographers who know the value of expensive lenses will buy them regardless to be able to do what they want to...

I have or have owned both. Both are too long for portraits, at least real head shot type portraits. They have shallow enough DOF to be used outdoors as crowd portrait lenses. But for in close head...

Too bad they don't make the Sigma 105/2.8 EX DG OS HSM in Pentax. From reviews it appears to have nearly the same high bokeh as the Pentax but is sharper at F2.8 and F4 than the Pentax. I'm still...

Ditto on that. I figure the only way I will get a Sigma 120-300 is if I buy it for my Canon system. Then I could sell my Canon mount Sigma 100-300/4 and Tokina 300/2.8 to help offset the cost. I...

Pentax could not do that. All of the Big 4 lost a landmark case about 40 years ago against mainly Sigma over the proprietary nature of their lens mounts. As long as someone like Sigma uses the...

When I was a kid I had one of those radium painted military watches from WWII/Korea. Even with that you had to sleep with the dial against your head for like 20 years to get a serious dose as I...

I don't know about ring lights (LED type) as I use a ring flash (Phoenix RL-59P) but really only for macro work. You can reduce the output for fill flash. The RL-59 is Pentax TTL but not P-TTL. I...

There is but why. The relatively cheap Canon 50/1.8 II will outperform the Pentax A 50/2, especially wide open and the corners are better almost everywhere. Plus you get AF. In fact the Canon...

That was the MSRP. It didn't sell for that on the street. I also seem to remember that in Art Morris's tract on shooting BIF that when using FF the longest and widest lens you could use and get the...

Too bad they did not start with a 17mm version then it could have been used for architecture on APS-C. Kent Gittings

That is a function of your browser setup not DPR. Mine has no problem doing just one tab or window in Win7Pro. Kent Gittings

The size of the pixel determines how many photons it can sink before saturation. The higher the ISO the higher the gain amplifier it turned up. The closer the photon energy buildup is to the max...

Correct. Look at the Zeiss Planar T* 85/1.4 ZA on the Sony APS-C. With the corners clipped by the reduced image circle it is a fanastic lens across the board. Much different than on the Sony FF....

The term capture has been used at least as far back as Ansel Adams so I think you are over reacting. Kent Gittings

I bought an Epson awhile back because it had a medium format/35mm film holder in addtion to doing prints. However when it came to 35mm film negatives/slides I got much better results with a Nikon...

You don't want a sharp portrait lens anyway. That is why 85mm lenses were a tad soft wide open. Nowadays you can use a sharp lens and soften it up in software. Could not do that in the film days....

Pentax filed a patent a few years ago for a 12-35/4 lens. That would be more in-line with what Pentax users are willing to spend and weight whiners are willing to carry. Kent Gittings

Wow! 5 low dispersion and 4 aspheric elements in one lens. This baby will not be cheap. $1500 at least. Kent Gittings

The pixel pitch has little to do with it if the lens is of high enough quality to resolve any pixel density. When comparing a lens across different cameras and sensors the numbers are totally...

I'm not sure about the performance of that aspheric element. Many current camera lenses use molded aspheric elements, but they are based on the Tamron patent which is much later than these. The...