PL and OCT19 mounts for the Brevis35

Sam Jankis · October 16th, 2006, 12:16 AM

Quote:

Originally Posted by Dennis Wood

10MB, 436x240 SD (fast)
10MB, 436x240 SD (slow)

30MB, 872x480 SD (fast)
30MB, 872x480 SD (slow)

Is compression responsible for the wiggly/liquidy bokeh?

Kristin Stewart · October 16th, 2006, 01:20 AM

Pentax K lenses are usually better than their M42 equivalents (older). Moreover, photographers have a kind respect for these underrated lenses... I know several big names who can't leave them... Please keep me informed of this, as I'm preparing a feature for a French director and we're going to do some shopping soon...

Kristin

Michael Maier · October 16th, 2006, 03:58 AM

Quote:

Originally Posted by Sam Jankis

Is compression responsible for the wiggly/liquidy bokeh?

I second that question.

Also, is that vignette on the corners?

Dennis Wood · October 18th, 2006, 07:30 PM

I'll be redoing these clips with an HVX, using the redesigned rails support to provide a rock solid mount. The GS400 in frame mode, is relatively noisy (particulary flipped as progressive footage)...however it serves as a good relative comparison. It's not clinical test footage(obviously) by any stretch. The 50mm portion looks to show a bit of vignetting, but to the left is a shaded trunk, and to the right, a tree line. Regardless, that 50mm lens could have used about 5% more zoom in.

The point of the test was to get the lenses mounted up and get an idea of the quality of the lenses. Once the dust settles a bit, I will be posting the promised test series to demonstrate differences in FOV, DOF, and sharpness between the lens types at a range of f stops. If you consider the challenges in accomodating all the cameras out there, and then add in the different lens types, and formats, it's pretty cool that I could strap the LOMOs on there and get footage without even an achromat :-) My sense of things so far is that these lenses are very, very good.

Sam Jankis · October 18th, 2006, 10:43 PM

Ah... didn't know those were shot with the GS400 instead of the HVX200.

Dennis Wood · October 19th, 2006, 10:51 AM

Jeeps, maybe I shouldn't be thinking about an upgrade then! I'll let you in on another tidbit that you guys picked up on. This footage was done using a prototype adapter that will allow independent variation of oscillation with respect to both frequency, and amplitude. It needs some work before production, but will be the "cat's meow" when it comes to more diffuser options :-) The diffuser in place for the clips was our current diffuser option 1.

Sam Jankis · October 19th, 2006, 05:00 PM

I found out my friend Jon just ordered a Brevis... needless to say, I'll be playing with it.

October 16th, 2006, 01:20 AM	#17
Kristin Stewart Regular Crew Join Date: Sep 2006 Location: Paris, France Posts: 75	Pentax K lenses are usually better than their M42 equivalents (older). Moreover, photographers have a kind respect for these underrated lenses... I know several big names who can't leave them... Please keep me informed of this, as I'm preparing a feature for a French director and we're going to do some shopping soon... Kristin

October 18th, 2006, 07:30 PM	#19
Dennis Wood Major Player Join Date: Mar 2005 Location: Ontario, Canada Posts: 916	I'll be redoing these clips with an HVX, using the redesigned rails support to provide a rock solid mount. The GS400 in frame mode, is relatively noisy (particulary flipped as progressive footage)...however it serves as a good relative comparison. It's not clinical test footage(obviously) by any stretch. The 50mm portion looks to show a bit of vignetting, but to the left is a shaded trunk, and to the right, a tree line. Regardless, that 50mm lens could have used about 5% more zoom in. The point of the test was to get the lenses mounted up and get an idea of the quality of the lenses. Once the dust settles a bit, I will be posting the promised test series to demonstrate differences in FOV, DOF, and sharpness between the lens types at a range of f stops. If you consider the challenges in accomodating all the cameras out there, and then add in the different lens types, and formats, it's pretty cool that I could strap the LOMOs on there and get footage without even an achromat :-) My sense of things so far is that these lenses are very, very good.

October 18th, 2006, 10:43 PM	#20
Sam Jankis Major Player Join Date: Jun 2006 Location: St. Pete, FL Posts: 223	Ah... didn't know those were shot with the GS400 instead of the HVX200.

October 19th, 2006, 10:51 AM	#21
Dennis Wood Major Player Join Date: Mar 2005 Location: Ontario, Canada Posts: 916	Jeeps, maybe I shouldn't be thinking about an upgrade then! I'll let you in on another tidbit that you guys picked up on. This footage was done using a prototype adapter that will allow independent variation of oscillation with respect to both frequency, and amplitude. It needs some work before production, but will be the "cat's meow" when it comes to more diffuser options :-) The diffuser in place for the clips was our current diffuser option 1.

October 19th, 2006, 05:00 PM	#22
Sam Jankis Major Player Join Date: Jun 2006 Location: St. Pete, FL Posts: 223	I found out my friend Jon just ordered a Brevis... needless to say, I'll be playing with it.