Blackmagic Forum

Hi there,

Gonna order three Hoya PROND filters, but not sure which ones would be sufficient for use on a bright sunny day, bright and cloudy day, cloudy grey day, when wanting to keep the ISO at 800 on BMPCC, and keep the iris
somewhere between 3,5 - 8.

Any help on that matter?

Standard daylight shooting filter set is ND0.3, ND0.6, ND0.9, and CPL*. Sometimes an ND1.2 IR can come handy.

Keep in mind the CPL filter besides polarizing, cuts down exposure by 2 stops, so it can act as an ND0.6 also.


Hope it helps




*in my corner of the world.

An ENG camera has .6, .9 and 1.2 ND's, this is what I got for my ND setup to start, adding a 1.8 later on, to avoid stacking.
Cheers

Most built-in filters, including the URSA Mini Pro, offer 2, 4, 6 stops and sometimes stronger. That would be my guide for usefulness. If you end up shooting with T4-T8 most of the time, which is around the best focus for many lenses, you will be good in most situations. There's going to be times when you might need to go to T2.8 or T11.


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Thanks a lot, guys!

Rick: yes, I wanna keep the aperture in that mentioned sweet spot (T4-8) combined with what I have come to understand is the BMPCC ISO sweet spot, at 800?  

So I think I will get a PROND4, PROND16 and a PROND64.

Seems to be a good start, and I can always stack to get a 8 or 10 stop-down with the mentioned filters.

Agree with Rick. With my UM46k I found 2 stops increments being the most useful choice.
I got IR-ND 0.6 (4), 1.2 (16), and 1.8 (64) which are serving me well in the middle of Europe.

So your choice of PROND4, PROND16 and a PROND64 should be a good start.

Thanks, Robert!

Nick: "Keep in mind the CPL filter besides polarizing, cuts down exposure by 2 stops, so it can act as an ND0.6 also".

True that, Nick. Just curious. Would using the CPL as a 2-stop ND filter, negatively affect the image in any way? Besides the obvious fact that it would get rid of reflections, when perhaps not needed to...

Daniel Mies wrote:Just curious. Would using the CPL as a 2-stop ND filter, negatively affect the image in any way? Besides the obvious fact that it would get rid of reflections, when perhaps not needed to...

You can rotate it so it doesn't apply the polarizing effect and just act as an ND, and when needed, rotate it into place to act as a CPL. Nothing else happens if you don't have it in the correct angle.

it's hard to shoot T8 on a BM Ursa Mini 4.6k tho unless you have very nice lenses. Most DSLR type lenses 35mm to 85mm will show magenta fringing on the 4.6k sensor at T8.

Thanks, Nick!

Daniel, I'm not sure how urgent your need is for the Hoya ProND filters. Next week, the IBC2017 trade fair will be held from Sep 14-18 I believe. I expect there'll be some new ND filters announced there if you can wait for it.


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Thanks, Rick! Will wait for some hopefully nice surprises then.

Where do you live ? Where are you shooting ? Sunshine is brighter in some parts of the world compared to others.

In Australia I'd want an N6 (2 stops) a 1.2 (4 stops) and a 2.1 (7 Stops)

JB

Hi John! I am mostly shooting in Scandinavia, currently in Poland. I got my hands on a speedbooster this weekend and did some tests with Sigmas 18-35 1.8. Aperture goes now from 1.0-9.5.

Daniel, I'm thinking the widest aperture is closer to f/1.3 or T1.4 rather than f/1.0. 1.8x0.71=1.28. Maybe I'm forgetting something.


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Rick, you might be right. However my BMPCC display says 1.0. I read quite a lot of different opinions on this matter, and no one seems to really be sure about this one. Would be nice to clear it out once and for all.
I got this one: https://www.bhphotovideo.com/c/product/ ... _lens.html

I knew I was forgetting something. 1.8x0.58=1 so you are correct. I was thinking of the MFT camera versions that are 0.71x focal reducers.

My brain hasn't been the same today after watching the final two closing episodes of Twin Peaks on TV. If you watched them, you'll understand and be amazed I can still type; if you didn't catch the 18 episodes this season, save your sanity and enjoy the world as you know it.


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Hehe. I know that feeling!

Stay tuned to IBC2017 Daniel to find something you may like. Shhh!


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Expectations are rising for every day now, Rick.

Daniel, I am quite impressed with the SLR Magic IEND1.2 86mm filter as illustrated in my review in another thread here. Plus shot a client video yesterday with it. To me, if you only bought one filter to start 'cheap' there's no better value than the IEND1.2 4-stop filter at $149 plus the cost of a step-up ring.


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X-mas came early... That looks very interesting, Rick. Would love to see what you shot so far. Specially how it handles bokeh.

The tests I posted from September 15 and 16, certainly weren't beauty shots including lens flares and bokeh. I'm trying to arrange another shoot with my model shortly. The IEND1.2 certainly won't cause bad bokeh. The APO lenses I use affect bokeh, not the ND filters. Still I'll include bokeh then when I do the beauty shots. Don't hold you breath though.


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