Circ. Polarizers on M glass

[J S H]

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29 minutes ago, Bronco McBeast said:

This is an iffy method, at best. Many planes of in the image are at different angles, and choosing the best maximum effect is only judged by seeing it. Also, depending in the color, annihilating a reflection can actually “increase the film speed”,  not lower it.

All in all, iffy at best.

Agreed. There really is no substitute for PRECISELY dialing in the amount of desired polarization. Sometimes the maximum effect is too much and you want a bit less. The swing out arrangement is great for this because you can easily judge the effect through only the filter, rather than through the viewfinder, or through the EVF. 

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[pippy]

4 minutes ago, J S H said:

I use the newest version......It's a great addition and probably more useful for normal focal lengths, in general. Even with a 35, you can get an uneven polarization effect in the sky...

Thanks for the info, J S H, as it's very helpful to hear from someone with first-hand knowledge of using the combo. Also interesting to know that there is also a ring for 49mm filters included in the pack.

Philip.

[pippy]

20 hours ago, Bobonli said:

...What about the color cast referred to in the previous post?...

OK.

Just carried out a test. Standard Colour-Checker shot using a variety of Circular Polarisers. Camera was Leica M-D Typ-262 fitted with a 90mm f2.8 Tele-Elmarit-M. Filters tested were a Leitz 39mm POOTR; a Leitz Series VII 13370; a Leitz 55mm 13357; a Jessops 37mm and a Hoya 43mm Pl-Clr. One frame was shot with the lens 'Bare'.

Images were captured as DNG files and processed-out in Photoshop with colour-temperature set to 5100 Kelvin(*). All other parameters set to 0.

Here are the results.

First-off the full Colour-Checker;

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To all intents and purposes for 'General Photography' it would (IMO) be perfectly acceptable to use any of these filters as there is such little difference between the whole lot of them.

Having said that there IS a noticeable difference between them when the Greyscale column is considered on its own and for critical work some CC fine-tuning would be beneficial;

For those who might be curious as to which filter was responsible for which 'set' here is the order in which they are shown.

Colour Shot;

Bare; Pootr; 13370.

13357; Jessops; Hoya.

Greyscale Shot;

Bare; POOTR; 13370; 13357; Jessops; Hoya.

My conclusion is that, as a rule, it would be impossible to tell under normal conditions which of these filters - if any - was used to shoot any photograph. If we take into consideration how large is the shift in C-Temp from 'Dawn-to-Midday-and-Back-Again' it could be argued that the 'Coolest' (the Hoya) might be better for some shots / times-of-day whereas the 'Warmest' (Jessops) better for others...

Philip.

* The nominal temperature of the flash-heads / soft-box combination used as tested.

Edited August 14, 2023 by pippy

[Bobonli]

Thank you!

[Bobonli]

I found a Universal Polarizer at an ok price. Arrived today. Wow, what a clever gadget and nicely made. Not as big and clunky as I imagined. Of course it's raining out!