C100: A short test of the Canon EOS C100 in Prague

P

Pave1

Well-known member
https://vimeo.com/60993010 (part1/day)

Canon EOS C100 + EF-S 18-135mm/f3.5-f5.6 (Peripheral Illumination Correction on / EF-S Correction off)
and XF100 for some control pictures.


RECORDED AS 50i (25 interlaced frames), I did sw deinterlace (AvidMC - fluid) for vimeo, so some fine diagonal lines can have a problem (see the blue locomotive at the beginning of the video, the rest looks ok). I made only quick color corrections for normal3, cine1, WDR and canon-log gamma curves.

The result of test is ok for me, I'm satisfied with a quality the internal AVCHD record. I see some banding on the sky at a last part of this test on the fine gradient (on the sunset sky) but cine1 and normal3 gamma look to be OK. This banding is from the 10bit A/D converter and from the 8bit record, cine1 gamma is ok for me (XF100 with cine1 gamma is also ok).
I tried various moods of colors at sunset at the end of test. Working with C100 is a very pleasing thing, because it is lightweight and a very powerful camera with good ergonomics. In sunny days is a good idea to connect an alphatron viewfinder, this help a lot. The rough sound is from the ME64 Sennheiser mic (A1) and from the internal mic (A2). The second part will be about evening - a lowlight with the C100 (with Canon EF 50mm/f1.4 , Tokina 11-16mm/f2.8 and EF-S 18-135mm/f3.5-f5.6).
I need a better glasses .-) .
 
thats very impressive looking footage. what F-stop & shutter speed were you using on the 18-135? ND filter? i did notice some stair stepping on the dark wires over the RR tracks and a bit on the train but much of the footage looked incredibly sharp and detailed. would you attribute the stair stepping to the fact that the original video was interlaced? have you tried shooting any of the other modes that are not interlaced?

my impression is that the much cheaper 18-135mm is sharper than my 24-105mmL lens. although the 24-105 is a versatile lens for general shooting i don't feel that its very sharp compared to all of my Canon primes but i use it a lot because i get a lot more out of it on the run.

I'm still getting used to my C100.

can't wait to see your night footage with the C100.

thanks
david
 
Hi David, thank you for your reply.

"would you attribute the stair stepping to the fact that the original video was interlaced?"

- yes, it is my sw deinterlace. Original clips at 50i are ok (the blue locomotive at the beginning of the video is also about deinterlace).

"what F-stop & shutter speed were you using on the 18-135? ND filter?"

- I was testing different gamma corrections, so it is depend on this setting. I used ND2 with the canon-log gamma (F-stop about F5-F10) and ND3 with a cine1 gamma and WDR gamma (F5 - F10 depend on light). If you want to know F-stop at special time then I will try answer.

"my impression is that the much cheaper 18-135mm is sharper than my 24-105mmL lens."

- Sharpness was set on default (SHP 0 and coring 0), some changes depends on an actual F-stop (F5 - F10). These relative high F-stops may causes this bigger sharpness on the EF-S 18-135mm glass. But I don't like this "plastic" glass, it is not easy make focus.

"can't wait to see your night footage with the C100."

- C100 is well-known as a master of lowlights, so I left this test for next week. But I hope that as soon as possible I will try to get to the end of this test with my loving new cam - a sweet C100 .-) .
 
david_p said:
i did notice some stair stepping on the dark wires over the RR tracks and a bit on the train but much of the footage looked incredibly sharp and detailed. would you attribute the stair stepping to the fact that the original video was interlaced? have you tried shooting any of the other modes that are not interlaced?
Click to expand...

I did a quick test of various methods of deinterlace - https://vimeo.com/61116805 (I suggest to download the orig. file)

In scenes without motion is better a blended deinterlace (no stair stepping) but the AvidMC fluid-timewarp deinterlace is the best for resolution and doesn't produce visible duplicated contours in motion. I like this method for deinterlace 50i footages.
If I need shot only for web than I will use 25p for recording.
 
Last edited:
Today I tested the differences between gamma corrections.

The following three images (tif) show the corrected output of the same scene, shot with Canon 50mm/f1.4 lens.
In yellow are the most visible differences. This weekend I'll do another test scenes.

Which picture do you prefer?

http://www.videoproduce.cz/images/001_c100_50mm.tif
http://www.videoproduce.cz/images/002_c100_50mm.tif
http://www.videoproduce.cz/images/003_c100_50mm.tif

here is the last one with corrected yellow (with secondary color correction)
http://www.videoproduce.cz/images/003_c100_50mm_b_yellow_secondary_correction.tif
 
Last edited:
You must log in or register to reply here.
Back
Top