Antone

Just kind of stumbled across Affinity Photo. Had no idea it could open Sigma raw files so I was quite surprised that it did. I really haven't done anything with this sdQ image, other than to make ...

So many favorites; not sure I can pick just one. :-) Aspen stand, Grand Teton National Park Oxbow Bend, Grand Teton National Park Schwabacher Landing, Grand Teton National Park

I bought my A7 used several years ago solely as a platform for recording images through my Canon FD lenses. :-)

The advantages of film are diminishing each year, but it still wins in a couple of areas - large format (resolution, movements) and better control of tonal range with B&W films. What's a shame is ...

D***. :-|

I've owned both and the new version is substantially better. Whether it's worth twice as much, only you can decide. :-)

Today's polymer resins ("plastics") are quite remarkable for their durability and stability, particularly in extreme temperatures. After all, if they're good enough to make this: Boeing 787 Dreamliner

Seems to me that since you have the equipment (presumably studio lights already since you're doing 4x5) and an SD15, you should just try it to see how it works for you.

Thanks for the nice comments. :-) Here's one with the Super Takumar 100mm f/4 macro M42 on the SD15.

SD15 plus Pentax Super Takumar 135mm f/3.5. Really nice combo when I hit the focus (which is challenging). Fishing in the Poudre River, Colorado.

It will be interesting to hear your thoughts because as of now, I see no reason to give up my original 70mm macro.

When I nail focus, my Canon FDn 50mm f/1.4 isn't too bad.

I use several Pentax M42 lenses on my SD15 and sdQ. I've posted a few shots here on the forum but I'd have to track down those links. I had issues with exposure as I stopped the lenses down, even ...

An example IR shot with the Cokin 007. Badlands National Park, Sigma SD15 (sans bandpass filter), Cokin 007, Sigma 17-50 f/2.8 at f/8.

The Cokin 007 is the appropriate IR filter for digital as well as IR film. I've had mine for a few decades - long before I had a digital camera!

The angles of view of these lenses are quite different. If you're shooting insects then I'd go with the 105mm for the longer working distance. If for portraits, I'd go with the 70mm for a crop ...

I noticed it does not have an HSM for focusing. I wonder how slow to focus and noisy it will be. It also has 49mm filter threads - quite narrow for a modern lens.

It works most of the time. It occasionally overexposes, which is rather frustrating.

Does it do real-time rendering of images, or do you still have to let go of the mouse button before rendering is performed?

If you mean the New FD 35-105mm f/3.5, that lens has a great reputation, other than its terrible minimum focusing distance.