Eggplantt

Aside from your reasoning, have you considered an enlarger lens? Probably the lightest setup you can get for macro work.

This is part of an interesting class of earlier telephoto zoom lenses that were a bit faster than what came after. That naturally makes me curious for the chromatic aberration performance given ...

Hopefully this is a fair bump- as someone who owns one of these (200mm f/3.5 AF) which is in nice, working condition- I was curious about the structure as an internal-focus 200mm lens. Well, from P ...

Well one of the described benefits is (1) Wide well corrected field off axis performance is similar to a Newtonian. CHief correctors contribute very little to the off-axis aberrations.

Also- the Makowsky design doesn't count as one of these TCTs as it was merely a cut-out section of an admittedly very fast Cassegrain- obviously making it expensive to produce: Now a TCT such as ...

I suppose it's also worth noting some designs, which I can't find right now, can weather quite high tolerance errors. Maybe not off-axis ones though...

Imo the argument stops here when it's just so heavy. I have the 200-500mm f6.9 which is okay up to 350mm wide open, but it weighs a tonne. It seems old telephoto zooms a tricky category to get ...

Yeah I had a thought that using such a gigantic screen would dwarf any texture pattern seen in people's previous attempts. I would be curious to see a video which continually shrinks the lens ...

This thread went in my favourite direction... Note: Alan has more experience here than I do. Alan's mentioned a lot about tolerances, and doublet with folded flats, I will focus on tilted-component ...

I've had an eBay saved search for this for ages- nothing has ever come up :-( :-( :-( :-( I would happily trade my Vivitar 800mm f11 for it, amongst other things.. EDIT: How did I miss out?? More ...

In terms of mirror lens design- I am waiting for someone to combine a telephoto, off-axis tilted component telescope (TCT) design (no donut bokeh) with solid glass lenses to shorten it: Pictured- ...

Lots of posts, where to start? Arguably 100mm refracting lenses are little larger than a typical 50mm prime - see the Olympus for example The equivalent centrally-obstructed Cassegrain mirror lens ...

What Prof Hank didn't also mention is these mirror lenses need time to acclimatise to the environment they're shooting in, if it's significantly different to indoors. Try waiting 30-45 minutes and ...

Seperate, but maybe related: would be nice if we could adopt angle of view (AOV) to group similar lenses across sensor sizes, and then lens aperture (like in telescopes).

Perhaps abit alien but...

It's probably worth a mention that in the cinema world, a confusing place, people have seemingly settled on sensor height + describing aspect ratio.

From what I can see it's used to settle matters...

Sorry, I can't edit that post now, but for clarity- "Voigtlander has recomputed their rangefinder lens designs to work better on Sony E mount cameras" - but chose not to here , which might explain ...

Out of the various 135mm f2.8 lenses tested here I found the Pentacon 135mm f2.8 to be the best balance of price/performance ...

This would be an interesting comparison between two lenses. The Adaptall-2 60-300mm was an SP lens, and the Tokina, whilst part of their AT-X line, was more on the consumer end, and (sadly) not ...

I agree but if you're not using a full frame digital camera then it's sort of wasted.

But fast APS-C native mirrorless lenses with the same equivalent depth of field have been produced by...

I have been going through Voigtlander catalogs (2016/2019/2021/2022), so hoping I can shed some light- they appear optically identical: E Mount VM Mount The optical design did not change between ...