PCC4K vs 6K for 16mm lenses

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rick.lang

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PCC4K vs 6K for 16mm lenses

PostSat Jan 25, 2020 5:16 pm

Another reason I’d prefer the BMPCC4K over the BMPCC6K is their 2.6K window. It’s about 0.6% smaller than than Super 16, but that just is a positive in helping a little with edge sharpness with a real Super 16 lens. And you have the choice of shooting 2.6K BRAW or recording ProRes HD with the in-camera downscaling from the 2.6K window. Either option will give you good results in post and have that Super 16 vibe.

Put a 1.33x anamorphic on that and your horizontal ‘crop’ is a respectable 2.18x for medium shots with a 32mm focal length, 70mm equivalent. With spherical lenses, crop is 2.89x which is a great medium close using a 32mm focal length (92mm equivalent).

When you want a shallow depth of field, if you can take advantage of the speed of lenses today, just opening the iris and moving closer to the subject helps.
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dondidnod

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Re: PCC4K vs 6K for 16mm lenses

PostSat Feb 01, 2020 6:48 pm

Thanks for the tip. My Rafcamera adapter only allows me to add shims to move the lens further away from the camera, not closer. I removed the six screws that hold down the stainless steel ARRI bayonet mount "bell" and added four pieces of Scotch Matte tape to move the Vario-Sonnar 10-100 F/2.8 lens closer to the sensor. This modification allows the bayonet "bell" to sit deeper into the Rafcamera adapter. It seems to have infinity focus now.

As you can see in this picture, the lens extends toward the camera's sensor. Due to this extension, you cannot use an ARRI B to EOS adapter with this lens, but it works fine with M4/3 cameras.
A007_01311247_S149.jpg
Zeiss 10-100 F/2.8 without the Bayonet mount
A007_01311247_S149.jpg (794.86 KiB) Viewed 6646 times

With two pieces of Scotch Matte tape as shims I took these pictures in Blackmagic Raw 3.1 on my BMPCC 4K a couple of days ago.

In the 2.6K sensor area at a focal length of 32mm and the aperture at T4, I shot this picture at the MH DeYoung Museum at Golden Gate Park from 12 feet away. This is where it starts to vignette and it is clean from 50 to 100mm.
Var32BR3126T4_S047.jpg
Zeiss Vario-Sonnar 10-100 32mm 2.6K sensor area
Var32BR3126T4_S047.jpg (859.74 KiB) Viewed 6646 times

In the HD sensor window at a focal length of 20mm and the aperture at T4, I shot this picture.
Var20BR31HDT4_S059.jpg
Zeiss Vario-Sonnar 10-100 20mm HD sensor area
Var20BR31HDT4_S059.jpg (814.08 KiB) Viewed 6646 times

I attached a a CAVISION CR82-75 72mm to 82mm Clamp-On step-up ring, then 82mm to 77mm, 77mm to 72mm, and 72mm to 67mm step down rings and mounted a Vormax Compact 1.33x ver. 1 anamorphic adapter. I have the ver. 4 on order and I hope that it will improve the chromatic aberration issue. This adapter prefers a sharp lens.

Here is a lens test I did with the Zeiss 10-100 Zoom at Golden Gate Park a couple of days ago with just the two pieces of tape for the back Focus adjustment with this combination, shot in HD at 25mm and the aperture wide open at T3.3, using a monopod. I focused on the tree trunks 15 feet away. That is why the foilage at the start is a little soft. The anamorphic adapter greatly reduced the depth of field.

I'm happy with this lens. I have money left over for more other gear since the cost is comparable to a Meike M4/3 Cinema prime. At 160mm long, 75mm wide, with a weight about 1 kg., it's much easier to handle than it would be if it was a larger adapted Super 35 lens at equivalent focal lengths.
Last edited by dondidnod on Mon Feb 10, 2020 5:53 am, edited 5 times in total.
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rick.lang

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Re: PCC4K vs 6K for 16mm lenses

PostSat Feb 01, 2020 7:07 pm

Great information as usual, Don. Super 16 will be fine at 2.6K on the BMPCC4K; but 16mm will have vignetting at the wider end. HD should be fine as you have shown.
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dondidnod

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Re: PCC4K vs 6K for 16mm lenses

PostSat Feb 08, 2020 8:52 pm

I recently had access to a Panasonic GH5S with a Panasonic Leica DG Vario-Elmarit 12-60mm f/2.8-4 ASPH lens. I did a two camera shoot along with my BMPCC 4K using my Carl Zeiss Vario-Sonnar 10-100mm f/2.8 16mm film lens set at 15mm to about 50mm.

I had an advantage by using both a Tiffen Variable ND and Hoya IR cut filter. I had to desaturate the color on the GH5S image to match my mine as it was more vibrant and too plasticy, with some bright orange fur from IR pollution. I chose ISO 100 at T/4.0, 1/60 Sec. with the 2.6K sensor area and shot this in Blackmagic Raw 3.1 with the film dynamic range setting while the GH5S used a UHD MOV file at around F/3.2, 1/50 Sec. in the 422 10 Bit LongGOP 150M codec. I chose this codec since I used a SanDIsk Extreme Pro V30 170 MB/sec. SDXC card. The low ISO on the BMPCC 4K let me recover more shadow details. I'm wondering how the BMPCC 4K video would have turned out if I had gone into the low light ISO zone and shot at ISO 1250 with heavy ND filtering.

I edited both of these screen captures in Lightroom. The BMPCC 4K screen shot is on top and you should scroll down to see the GH5S image.
P4KBFootBR3126K100Top&GH5S10BitGOPUHDA.jpg
P4K Zeiss 10-100mm 2.6K top & GH5S Leica 12-60mm UHD bottom
P4KBFootBR3126K100Top&GH5S10BitGOPUHDA.jpg (953.28 KiB) Viewed 6501 times

The full video can be seen here combining the two cameras, fast forward to 1:19 to see the close up from the GH5S:
Last edited by dondidnod on Mon Feb 10, 2020 7:33 am, edited 8 times in total.
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rick.lang

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Re: PCC4K vs 6K for 16mm lenses

PostSat Feb 08, 2020 9:49 pm

Don, I think the Sasquatch didn’t like the Panasonic footage. Right?
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dondidnod

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Re: PCC4K vs 6K for 16mm lenses

PostSun Feb 09, 2020 3:54 am

He's confused. He has a lot of bug bites on his face and tries to avoid jobs where they shoot 4K because of it. He likes to keep his face either in the shadows or in full sun so the blemishes are bleached out. He likes shots that obscure the fact that his feet are not as big as he boasts them to be. This could have an impact on his choice of future nest mates.

He heard from actor's equity (jerky, lard & salt licks) that if he spends time with cheesy looking projects then it lowers his take.

He's been in a funk ever since his nest mate went Hollywood and started bringing in some good grub. His ex is doing well and he is embarrassed that his plans have not worked out. He's getting old, and can't catch squirrels as easily as he used to. His ex has a modelling job coming up from Big 'Uns magazine, but they're not interested in hiring him. Here is a shot of her at the new movie at the Roxie in San Francisco.
P_20200201_185413_vHDR_On_1_1.jpg
Lady Bigfoot
P_20200201_185413_vHDR_On_1_1.jpg (826.62 KiB) Viewed 6533 times

He has a concept for DOES BIGFOOT SH*T IN THE WOODS?, but he needs a ghost writer and nobody seems interested in the production. He does have a nibble from a taxidermist, but needs an agent to work out the details.

I used a SanDIsk Extreme Pro for the GH5S, and thought that UHD Long GOP 150M on the codec meant MB/sec., and ALL-I 400M would be too much for a 170 MB/Sec. card. It turned out that it recorded at only 16 MB/Sec. (131 Mbps?), so maybe I could have gotten a better image. The BMPCC 4K video recorded at 76 MB/Sec.
Last edited by dondidnod on Mon Feb 10, 2020 5:59 am, edited 1 time in total.
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Re: PCC4K vs 6K for 16mm lenses

PostSun Feb 09, 2020 7:33 am

Maybe it’s just time to talk to a retirement planning specialist! Leave a business card in the woods and he may even be able to relocate to that woodsy home on Vancouver Island close to us to where Prince Harry likes to retire.
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Re: PCC4K vs 6K for 16mm lenses

PostWed May 05, 2021 5:52 am

Jean Capdouzey wrote:You will never get 16/S16mm C-Mount lens to reach infinity focus on the P6K, never....unless a piece of optics was inserted between the sensor and rear flange. The sensor is simply to far away. You would have to put the lens inside the camera mount to get any decent focus.
Best to stick with the P4K and wait for the S16 crop coming soon.

I was able to get a S16 lens to work on a BMPCC 6K, with a Bezamod "deep mod" PL mount conversion. No optics were used.

4KBRAW or 6KBRAW
viewtopic.php?f=2&t=140559
Last edited by dondidnod on Wed May 05, 2021 8:56 pm, edited 1 time in total.
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Howard Roll

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Re: PCC4K vs 6K for 16mm lenses

PostWed May 05, 2021 10:38 am

C-mount is only 17.5mm, Arri B and PL are both 52mm. That said, there’s really no such thing as a c-mount S16 lens.

Good Luck
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Re: PCC4K vs 6K for 16mm lenses

PostWed May 05, 2021 12:22 pm

The Angenieux 20-80mm f2.5 sitting right in front of me is S-16 and has a C-mount.
(At least Du-All Camera is listing it under S-16, like a few other C-mount lenses.
No, an iGPU is not enough, and you can't use HEVC 10 bit 4:2:2 in the free version.

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Howard Roll

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Re: PCC4K vs 6K for 16mm lenses

PostWed May 05, 2021 1:13 pm

Which C-mount S16 camera does it fit? Oh right.

Good Luck
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