KentG

A 20 year member of the AstroMart forum is selling off a Pentax Kit in one lump that is priced really good. Similar to the kit I bought a year or so ago that included the Sigma 180/3.5 EX DG Macro ...

Other than the Pentax 50-135 with its motor issue the only other lens out there was the Sigma 50-150/2.8 EX DC HSM. Sigma went thru 3 versions of this lens then killed it due to low sales. Its ...

Those are nice shots. I have been using my 50 year old Vivitar Series 1 105/2.5 Macro along with its 2x Macro-Focusing Tele-Converter to get ratios as high as 4:1 for about 2 decades at somewhere ...

I have found that if I want to shoot film, and the best film camera I ever used was the Minolta Maxxum 9 the last one I used before my first DSLR, I will bring out my Pentax MZ-S which does ...

I could not wait for the better motor so I bought the Sigma 50-150/2.8 instead. Kent Gittings

Currently Sigma is making prime Art lenses that are testing out as sharp or sharper than Zeiss equivalents. Sad to say that none are made for Pentax. I have an Irix 11/4 Blackstone for my K1 that ...

I had saved a Sigma 24-60/2.8 EX DG for when I finally bought a FF Pentax and sure enough I did buy a K1. Also this was the lens I kept from a group including the Tokina AF 28-70/2.8 AT-X Pro II ...

I seem to remember in its day a few Nikon wildlife shooters owned a Pentax PZip body just to be able to shoot this lens when the need arose. Kent Gittings

Sigma used to make a KAF3 version of the Sigma 180/3.5 EX DG Macro HSM, which I now have. Came as part of a kit I acquired with a K-3II and a couple other lenses. Kent Gittings.

Sometimes there was but I never had an issue with any of the Sigma 28-70/2.8 although a 28- is a fairly early lens as most recent ones are 24-. I use a Sigma 24-60/2.8 EX DG and it has worked ...

A little history first. I have switched to different systems at least 5 times in my film days having used Canon, Pentax, and Minolta and switched back to a previous ones once or twice. I ended up ...

No. Sort of like the early Egyptians where the people owed a certain amount of time every year to projects from the leaders. See my brother's landscapes of the ancient peoples of the Four Corners ...

Neither of those cameras are Full Frame. Kent Gittings

I had a couple of the Macro rail film duplicators in the old days, but when I finally decided to digitize all my racing photos shot during the film era I opted for a Nikon Coolscan 2700ED. I ...

Thanks for the clarification. Kent Gittings

You need to drop your shutter speed to around 1/250 because these all look like static shots. That is to blur the wheels to show speed. Kent Gittings

Its pretty good. but its an older technology which means the barrel is a little looser to get faster focusing speed and they have a reputation of  a few having one of the front elements delaminate ...

All my racing and motorsports photography was done in the USA. I only did trap-focus when I was using Tamron Adaptall 300/2.8, 400/4, and 200-500/5.6 manual lenses with Pentax film and digital ...

That is why I also have a Sigma 50-150/2.8 in Pentax. I don't find much use for a regular standard 50mm prime outdoors, especially when I have 50, 105, and 180 1:1 macro lenses which are useful to me.

3x zooms are way more expensive than 5x or more zooms in general because they can be made much better. Its way easier to make a top 3x zoom because the limited zoom range means you can make it ...