Antone

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.

Easy. Keep it under your jacket. Works fine, then. Just inconvenient to take it out whenever you want to take a shot.

The solution is to keep the camera in my coat while snowshoeing. Keeps it warm, but unfortunately also risk of moisture from perspiration. But it works.

I just used the latest 10.13.2 from Apple and the installation guide at tonymacx86. There are a few ASRock 3xx threads that have more details. After I installed the update from Apple that addresses ...

It is rather coincidental that I just put together a new hackintosh a few days ago. I am very happy to report that it is the first Mac/hac I've used (other than my office 12-core 2010 5,1 Mac Pro) ...

I occasionally use a Pentax 50mm f/4 macro lens with an M42 to Sigma SA mount adapter. The Pentax lens is pretty easy to locate at eBay or KEH. The mount adapter was from eBay, made in Poland and ...