View Full Version : Letus35XL 35mm - first impressions
John Benton April 11th, 2006, 09:41 PM Quyen Le has made, and will continue to refine, a fantastic product !
It is a 35mm adapter with a relay lens for the XL series - this means it does not go on top of the lens, but replaces it.
This means that there is no light loss as far as my uninformed eyes can tell; and you don't have to worry about an insane size of an adapter on an already long camera.
Plus it has an image flip built in...beautiful.
Now,
This is the first 35mm adapter I have used (and my first day using it)
so you may take what I have to say with a grain of salt.
& there are some issues with my beta unit. But Quyen has been great about addressing these! It is at the beginning of it's very first production cycle and I am confident that he is trying to build the best and most affordable product he can and will only keep making this better!
These are my very first tests with it on the H1 and I will continue to post clips.
They are 1080 60i that I deinteraced and that's all.
They were shot with a Nikkor 50mm lens
http://reelshit.com/Letus35XL-H1/
~John
Brian J. Harris April 11th, 2006, 10:41 PM Hey John,
Thanks for posting these! I'm downloading overnight.(the joys of dial-up)
Look forward to reading some more about your experiences with the product at a later time.
Barlow Elton April 11th, 2006, 11:56 PM Thanks for posting those John! It's great to see some raw stuff even if there are focus issues.
What do you think so far? It looks promising, but like a lot of these devices, I'm wondering if the image can be acceptably sharp in 1080. I haven't yet seen anything go sharply into focus while the background is heavily blurred out. It also looks a little washed out and foggy. Any thoughts as to what's going on? Btw, after doing some very simple adjustments in QT player with contrast and color, it has a very interesting feel to it. Those guys with the red sweaters that walk by in the background of the Kat clip just POP with a little adjustment! This adapter and that lens add a very interesting colorimetry that is quite different from the 20x.
Again, thank you VERY much for posting! It's very generous of you to put that stuff up so quickly. That said, I'm still jonesin' for more!
One last request. PLEASE shoot some 24F and capture it via HDVxDV or DVHSCap. It would be SOOO cool to have some of this material with true film motion.
Yasser Kassana April 12th, 2006, 02:53 AM I wonder what issues are. I always get the best sharpness when i focus on infinity on gg when zooming in. How much do you have zoom in, that is if you on the relay letus? Also, for sharpness use a tighter aperture on the zxlh1 itself, say for example like f4-5.6.
John Benton April 12th, 2006, 05:04 AM Yes,
changing the aperture will do this.
There is an aperture control on his adapter as well to the lens !
When I mentioned this to Quyen he said he had thought to lock the ap at 4 (as he could have)
but chose not to, so we have an option for low light.
There is no ground glass to focus on (that has been established) There is the focus of the relay lens, which I didn't touch as it looked good out of the box,
This might be an issue I need to play with
I'm not sure why things look washed out. But I don't think its the adapter.
I will add more clips later and do more testing tomorrow
J
Yasser Kassana April 12th, 2006, 05:25 AM Well the focus on the focus screen in the adapter to infinity. Then put on the 50mm nikon lense, might resolve some of the issue.
John Benton April 12th, 2006, 05:28 AM Thanks Yasser - I'll try that later !
Actually, What am I talking of?
You cannot focus without the 35mm lens on.
I think a lot of the focus problems I was having were due to trying to focus in the viewfinder of the canon.
... thinking of an on Cam monitor - purely for the focussing nuances
Jack Foley April 12th, 2006, 05:58 AM John, I am waiting for the final G35 and I just order a Marshall V-R70P-HDA (http://www.lcdracks.com/monitors/vr70phda.html) exactly because of the focusing issues I have with the standard viewfinder. It was brought to my attention that this is the best-for-bugs small HD monitor available. I haven't seen it yet so I cannot recommend it yet.
Jack
Ron Pfister April 12th, 2006, 06:06 AM John: does the G35 allow for focus fine-adjustment between lens and ground glass and/or ground glass and sensor, or is everything fixed?
Jack: I'd be happy to hear your impressions of the Marshall unit once you receive it. I own a Marshall V-LCD12 and I'm underwhelmed to put it mildly.
John Benton April 12th, 2006, 10:43 AM The G35, I think will, when it comes out.
But I am using Quyen Le's Letus35XL and there is no adjusting focus with the camera.
There is a relay lens that you can fine focus by screwing in/out further if nee be and I may try this.
Notice in my clips that the focus does seem to hit at times, mostly however, I am searching for the very thin focus plane.
I will try honing my skills before messing with the adapter.
J
John Benton April 12th, 2006, 02:17 PM More tests from yesterday going up now:
http://www.reelshit.com/Letus35XL-H1/
same thing:
http://www.bentonjohn.com/Letus35XL-H1/
edit: have to wait again until I gets home
Tony Tibbetts April 12th, 2006, 02:34 PM Keep the SLR lens wide open and stop down with the relay lens. This will make for a sharper picture. I figured that out after a few hours of shooting with the camera. Don't stop down any farther than f4 on the SLR lens.
John Benton April 12th, 2006, 10:40 PM Yes this is very true...
Take the Lens wide open and close the aperture of the Relay
I dont love the light loss for a sharper picture, but, I can light and put on the gain if need be - I am uploading a file now that has No Presets and -3 Gain, I kept the adapter aperture at around 4 or 5 ...looks ok.
I am greatful to have the Flexibility though of opening the aperture all the way, though, so I can shoot in Darker scenes ...Though I loose focus on the edges alot and the whites bleed massively around the frame too,
Sometimes this is a very nice effect.
John Benton April 13th, 2006, 09:36 AM my file transfer amount has been reached, so they closed off my site.
I am trying to up the amount of data transfer I am alloted, but we'll see how fast customerTech support reacts
Guest April 13th, 2006, 09:18 PM Is it possible to have it at PC side, please?
John Benton April 15th, 2006, 10:37 PM ok
files are hosted at Filefront (it is evidently a bit of a pain to download, but...)
http://dashboard.filefront.com/bentoon/
I'll keep uploading them & others.
So far all files are 1080/60i,
some are deinterlaced in Qtime.
It is a pain focussing through Canon's veiwfinder - I need to get a small on cam monitor, so patience to with my focussing...
I will get to 24f clips & some tests with Winston Vargas' 70mm adapter soon too,
cheers,
J
John Benton April 18th, 2006, 03:38 PM -more Lettus35XL_H1 footage going up:
-along with some of the 16x9 wide angle tests
-& Winston Vargas' 70mm adapter first tests on the H1 (it's better on the DVX, but will be modified)
Enjoy.
comments & requests welcome,
J
Chris Hurd April 18th, 2006, 03:52 PM Much appreciated, John! I'm glad that Winston is still putting things together -- I had the pleasure of meeting him several years ago, he had a wicked GL1 set-up. I'll try to find those photos.
(Hello Winston if you're reading this!)
Shane Valdez April 20th, 2006, 12:54 AM Here are two pictures from the LETUS35XL and Canon XLH1.
(rack focus)
http://www.dvinfo.net/gallery/showimage.php?i=435&c=3&userid=13126
http://www.dvinfo.net/gallery/showimage.php?i=436&c=3&userid=13126
I did Have to contact Quyen and he instructed me how to fix the BACK focus for the adaptor.. after the backfocus was fixed... well you be the judge.. alot sharper.
Tony Tibbetts April 20th, 2006, 03:17 AM Hi Shane,
I was curious what you used for lighting in those two shots? It appears to be just the light from a monitor.
Shane Valdez April 20th, 2006, 10:35 AM Correct! Just light from my G5, I'm looking directly at the screen.
Winston Vargas July 26th, 2006, 06:10 PM -more Lettus35XL_H1 footage going up:
-along with some of the 16x9 wide angle tests
-& Winston Vargas' 70mm adapter first tests on the H1 (it's better on the DVX, but will be modified)
Enjoy.
comments & requests welcome,
J
John my adapter is finally available for $695.00 using 2 1/4 x 2 1/4 groundglass and medium format lenses. (Mamiya 645) for further info and photos check:
www.freewebs.com/wvargas/
Thanks
Winston Vargas July 26th, 2006, 06:14 PM My adapter is finally ready.. selling price $695.00 promised to be different than all others since I am using medium format lenses and a 2 1/4 x 2 1/4 groundglass with an active size of 1 5/8 x 2 1/4, twice the size of 35mm.
Check it out at:
www.freewebs.com/wvargas/
2-3 weeks delivery after order..
|
|