SmoothOperator

Probably not looking up that one sorce that I had at this point, thanks!

https://www.finishing.com/106/51.shtml

Is titanium a good metal for that?

Titanium is stronger than steel per unit weight, but it is much less dense, requireing more space to get the same strength and lacking certain properties.

For...

Its hard to tell, because it seems to be so dependent on the lens I use it with. With the 55mm 1.2, the roxen has fine contrast, maybe not the best resolution. On the wide angles, it just seems...

Its hard to tell, it looks like you are getting mostly spherical aberation, as tastefully executed as it is. I think ideally I would use an aspheric lens possibly with a field corrector.  I'm not ...

Nice are those branches green, or is that the undistorted color?

I've been using a focal reducer for a while. Is flare actually that much of a problem, or is this more of a kludge to prevent adapters from being swapped around and used on larger sensors?

I tend...

I guess I can see it being a problem if people go off the well maintained trails. If one person goes orienteering through the wilderness with a topomap and finds a great view its not so bad, but...

Interesting, we can talk more about this.  Do you know a good cheap water proof emount adapter?  The nikonos ones are like $90.

ah pentax makes an inexpensive wireless remote: https://www.amazon.com/Pentax-39892-Waterproof-Remote-Control/dp/B0039WP4A2

Video housings that don't require shutter releases seem much simpler.  Does anyone use a shutter remote under water.  Can you just use a simple drybag or sandwich bag for the remote?

To me the effect resembles motion blur, where part of the image is artificially blurred while the rest isn't.

There are some nice split focus filters out there, but I'm wondering if other lenses like a pair of bifocals can be repurposed, or these graded optometrist test lenses, that step up a quarter of a ...

Possibly, I could conceive of a sensor that measures the time to over exposure(full saturation) rather than the amount of light that hits in a unit time.  EG measuring the time that it takes to ...

No third party mf lens support, again. Maybe they will make a lensfun plugin.

Its hard to say I shoot alot of practice shots, that I really never intend to keep.  With wildlife I shoot alot of squirrels, and small birds.  Before I go out or after I switch lenses, I snap a ...

The eye wandering effect is what I like about wide and ultrawide lenses.  I prefer to call it an "immersive" experience.  Like being under water, if you think about it, there is a reason they call ...

Interesting idea.  I think people don't really take into account all of a lenses properties when choosing.  I don't know about all wide lenses(8fish,17mm,24mm,28mm), but I find my wide angles have ...

So the corrected term is aplanatic an example of which is the Petzval lens, that corrects SA and coma but not CA. Ah.

A diffraction grating is neat. I've been thinking about the a reason for a lens which doesn't correct for CA(or even accentuates it to exist). One scenario is colorful scenes in low light. The ...

One of these aspheric lenses might give colorful images, https://www.edmundoptics.com/f/Plastic-Aspheric-Lenses/13968/