wow...Letus Extreme and EX1 *FIXED* Sharp as a tac....

WOW! That's nice to know. Getting an EX1 for testing tomorrow, and was worried how it would perform with my LEX
 
Steve, you mentioned something about a motor on the Letus. What purpose does it serve? The Letus web site comparing various models talks about a silent motor vibration feature. What is its purpose?
 
The motor, know as a vibrator, vibrates the ground glass that the image gets focused on, so that the the grain of the ground glass becomes transparent.
See this: http://en.wikipedia.org/wiki/Depth-of-field_adapter good explanation. also Philip Bloom has a good description of adpaters, as well @ http://web.mac.com/philip.bloom/Shootout/Intro.html

You can see a close-up of the Letus vibrator here: http://web.mac.com/stevecahill/Steve_Cahills_Blog/Blog/Entries/2008/1/6_Letus_Autopsy_1.html

Regards
Steve
 
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This might be a dumb question but I'll ask it anyway:

Would this fix work with other 35mm adapters such as the M2 or is it only designed to work with the LEX?
 
socbret said:
This might be a dumb question but I'll ask it anyway:

Would this fix work with other 35mm adapters such as the M2 or is it only designed to work with the LEX?
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My guess is that it could work. The problem with all adapters seem to be the achromatic lens. It's probably either the strength or the fact they are all smaller than the 77mm EX1 lens or maybe both. The Letus is just proving a new achromatic lens. Just like the M2 achromatic lens works on other adapters and so does the Brevis and SGpro achromatic lenses, this"should" work for other adapters too. Of course, there's no way to know without testing. But I don't see why it wouldn't.
 
it's designed to focus on the exact distance between the achromat and the letus gg. Can't see how it would work with m2 etc unless their distance was identical.

This is a unique achromat. Designed for a specific camera/ adaptor combo.

I tried it out today and got astonishingly sharp edge to edge results.
 
philip bloom said:
it's designed to focus on the exact distance between the achromat and the letus gg. Can't see how it would work with m2 etc unless their distance was identical.

This is a unique achromat. Designed for a specific camera/ adaptor combo.

I tried it out today and got astonishingly sharp edge to edge results.
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Well, an achromatic lens normally has a certain distance range it would work. They are normally not that particular. Maybe if you use the M2 flip module it would fall close enough since the Letus is a flipped adapter. Besides, I doubt this is specially designed for the Letus. If they are saying so it's most likely marketing. If they had the resources or could afford a specially designed lens they would have a specially designed relay lens for their Letus XL and HD100 and yet they use a 50mm lens made for 35mm still cameras which yield very poor results.
 
i really wouldn't compare old Letus with new Letus.

They made the ex1 achromat from scratch, not just for the ex1 but the letus extreme. It corrects the spherical anomalies that the ex1 lens causes. . Not marketing. They old letus xl and hd100 used crappy old minolta lenses for the relay. I had an old Letus FE and was very focal in it's crappiness. The extreme is light years apart. They are making new relays for the xl and hd line that WON't be minolta glass.

Best thing is to PM hien. a nice bloke. I am sure he will answer your questions rather than let us all speculate!!
 
Well my LEX with EX1 achromat is on the Fedex van for delivery today!

If it arrives early enough I will try and take it out into the garden to a test.

Without going through lots of threads, how far should I zoom into roughly with the EX1 to get the right framing?
 
I zoom in at z80 with all my lenses except the canon fd 20mm f2.8 which requires a bit more zooming in.

But Phil mentioned that with the new EX1 kit achromat you dont have to zoom in as much. I have it on order as well and Im very much looking forward to using it.

Phil, how much do you generally zoom in at with the new achromat?

Sami
 
philip bloom said:
i really wouldn't compare old Letus with new Letus.

They made the ex1 achromat from scratch, not just for the ex1 but the letus extreme. It corrects the spherical anomalies that the ex1 lens causes. . Not marketing. They old letus xl and hd100 used crappy old minolta lenses for the relay. I had an old Letus FE and was very focal in it's crappiness. The extreme is light years apart. They are making new relays for the xl and hd line that WON't be minolta glass.

Best thing is to PM hien. a nice bloke. I am sure he will answer your questions rather than let us all speculate!!
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Yes. But specially now that they have released the flip module to fit 3rd party adapters, the new achromatic would fit right in. Since the flip is most likely the same distance as the Letus, the new achromatic would work and fit like a glove. In a SGPRO, you would basically end up with a spinner letus.

By the way, how many stops does the extreme lose?
 
Mediacre said:
Yes. But specially now that they have released the flip module to fit 3rd party adapters, the new achromatic would fit right in. Since the flip is most likely the same distance as the Letus, the new achromatic would work and fit like a glove. In a SGPRO, you would basically end up with a spinner letus.

By the way, how many stops does the extreme lose?
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Less than half. But quoted at .5
 
the only camera the ex1 letus achromat is made for is the letus extreme, will it work with the SGPro. Sure. Will it give it perfect edge sharpness, unlikely. The distance is different to the Letus Extreme. They really have made it specific for the Letus Extreme.

Saying you then have a spinner Letus just because you have a letus flip is silly! it's still an Sgpro for all the plusses and minuses that brings!

best to ask Letus themselves. Either Hien, DeGrey or Aaron Pin about what happens when you use the achromat on other adaptors.
 
hienle said:
The fix WILL NOT work with SGPro. You WILL NOT be able to screw the achromat into place.
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It may not work on the SGPRO straight. But once you have the letus flip module on the SGPRO, you can then screw the achromat right? The flip has the very same end as it is on the Extreme right? The module also looks to have the very same light path as the extreme, which would make the achromat work too, right?
 
Dude. Hien is the creator of the Extreme and letus Flip.

I mean, it's one thing when I tell you all this same information and you REFUSE TO LISTEN, it's another when you question the creator.

Give it a rest. It won't work. Wait for Wayne to make one.
 
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