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Old January 29th, 2008, 07:50 PM   #1
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Anyone using 35mm adapter with Ex-1

I tried setting up my Ex-1 last night with both a Letus EX and a Brevis Flip and in both cases had a bad time getting anything close to decent corner focusing. Anybody else try this ? How did it work for you?

Lenny Levy
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Old January 29th, 2008, 08:01 PM   #2
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Philip Bloom bro.....
Look him up.
http://www.philipbloom.co.uk/Philip_Bloom/Home.html
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Old January 29th, 2008, 08:46 PM   #3
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tried Philip - no reply yet.
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Old January 29th, 2008, 09:39 PM   #4
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I know with the Redrock M2, you need about 2" of spacers, at least that what they said.

I haven't tried my Redrock M2 with my EX1, but will soon.
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Old January 30th, 2008, 04:36 AM   #5
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A quote from Letus Forum:

"Some EX1 users may experience a spherical anomaly from the EX1 lens. For example. on our test EX1, the right side of the screen seems to be darker than the left. If we swing it quickly to the left and return just a bit, it goes away and then reappears. This indicates there is something going on with the hardware of the EX1.

For the focusing issues, we have looked at the EX1 lens and will have a solution to compensate for the problem is in production now.

This is NOT a problem with Letus35 Extreme, it is the problem with the Sony EX1.

In the mean time, please see this image for focusing help.

http://www.letusdirect.com/images/mi...focus-help.jpg
-DeGrey"

I am able to get very good focus with this method, takes a little tweaking though.
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Old January 30th, 2008, 04:39 AM   #6
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This is how I achieve "Critical Focus" with the EX1 and LetusEX QT movie shows how @
http://web.mac.com/stevecahill/Steve...cal_Focus.html
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Old January 30th, 2008, 05:25 AM   #7
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Steve thanks for that! I whish I had seen that when I first got the LEX. Would have saved me a lot of time testing and writing questions to Letus :)

Sami
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Old January 30th, 2008, 01:00 PM   #8
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Thanks Sami and Steve, I'll watch the blog vidoe and see what's possible.
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Old January 30th, 2008, 01:14 PM   #9
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Well i just watched the video and I guess there's no trick it just depends on what you're shooting and what you're doing with it. At least I know that everyone is having the same issue and that the manufacturers are working on it.

Thanks, Can't wait for a fix though.

By the way, for what its worth, my method of working with any adapter is to carry a 3-4' resolution chart with me on the set and double check the focus whenever i can with the 35mm lens on the rig., I just back & forth beween the 35mm focus and the video cam. Seems very safe and relaible. Of course it wouldn't work if you like Philip out by yourself shooting gorgeous landscapes, but on a set its reliable.

Lenny
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Old January 30th, 2008, 01:26 PM   #10
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I have the M2 and have been tweaking to get the perfect balance. I have similar problems with the edges but not light/dark issues so much as clarity. I find it similar to what I have achieved with my XH-A1 and prior FX1. Perfection is tough and the EX1 and adapter are only part of the chain. A lot also has to do with the lenses you use and I wish I had some Zeiss primes. These were focused dead-center so I am going to try the off-center suggestion. Here are a couple of pictures of my focus tests using cheap old nikon primes.

Pics of setup:
http://www.tampahighdef.com/exfocus/fullexrig.jpg
http://www.tampahighdef.com/exfocus/closeup.jpg

Focus tests:
http://www.tampahighdef.com/exfocus/nikon50.jpg
http://www.tampahighdef.com/exfocus/nikon100.jpg

One more test, less zoom, further from the camera.

http://www.tampahighdef.com/exfocus/nikon50mm-0130.jpg

Last edited by Bryan Suthard; January 30th, 2008 at 09:56 PM.
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Old January 30th, 2008, 07:49 PM   #11
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Just did a audio interview with Phil Bloom over @
http://web.mac.com/stevecahill/Steve...lip_Bloom.html

Also a interview with Hein Le with Letus over @
http://web.mac.com/stevecahill/Steve...s_Company.html
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Old January 30th, 2008, 08:07 PM   #12
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did hien say how far out he is with the achromat/diopter for the EX1
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Old January 30th, 2008, 08:15 PM   #13
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Not in the interview.. My guess real soon. I will post a critical focus test as soon as I get my glass, for all to see. Standby.....
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Old January 30th, 2008, 08:37 PM   #14
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good news. eager to see the results.

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Old January 31st, 2008, 06:22 PM   #15
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don't listen to my interview. It's nonsense.

On my dungeness short i got some cracking edge to edge with the ex1 and letus. Just wish i knew what I did.

I to am waiting for the letus fix. I expect it will be a must buy for anyone with a Brevis too (perhaps the SGPRO?) as it will fix that close up focus issue.
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