Thoughts on Letus 35 Economy and other 35mm Adaptors


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MalcolmOng

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Alright here's a short write up on my experiences with the Letus35 Economy thus far. I'm going to begin with the general aesthetics of the unit - The build quality is fairly rugged, even though it's plastic. Feels as though it can take a hit or two, but I'm not going to play soccer with it anytime soon. However the battery cable seems a bit vulnerable - in future I will probably tape it down, so that it won't get caught on anything and risk being ripped out.

As for ease of use, I found focussing and actually shooting stuff with this adaptor pretty easy and stress free, and even with my limited experience, it was pretty easy to nail the focus most of the time. However, it is really tough to use handheld, mainly because the adaptor causes the center of gravity of the camera to shift forward by so much. For the DVX, the center of gravity is beyond the handle, causing quite a bit of wrist stress over long periods of time. Consequentially, it's pretty tough to keep it stable when you're going handheld with it. To fix this, I'll try waiting for my rails to arrive, and then jury-rigging a sort of counterweight system at the back of the camera to bring the center of gravity back to the handle. I got the 18" rails from indifocus, so they're longer than the camera, and should have enough leverage to counteract the weight of the adaptor without too much added weight to the camera. Will update when everything comes together.

Now, what everyone's been looking forward to - the image. I love the quality that it gives the image. It's got a really nice softish look, but I don't really think it's as sharp as it should be yet. As far as 35mm adaptors go, based on footage I've seen, the Sgpro is consistently producing the sharpest images, in my opinion at least. However, I went with the Letus 35 Economy because the Sgpro's flipped image makes it a bit impractical for me with regards to how I shoot, as I don't have a monitor, and an image that is both horizontally and laterally flipped would make it really hard for me to work on the go. I thus decided that the Letus35 Economy offered the best compromise between practicality, price, and image quality. My caveats with the image are the slight vignetting that occasionally occurs, and somewhat uneven light distribution. However, neither of this is noticable in most situations. The adaptor by itself is pretty darn sharp, but I'm positive I can improve the sharpness once I've had more time with it. Oh, and I've fallen in love with its lack of light loss.

Anyway, these are my thoughts on the Letus35 Economy so far. Will update more once my package is complete. In the meantime, if you have any questions, feel free to ask.
 

Hi Malcolm. Thanks for the review. Quick question - have you managed to estimate how much light loss you are seeing for the whole rig compared to the DVX on its own?
 

Well, I'm not sure how to do that technically. I'll probably try to benchmark that for you later on. David's got a second DVX, so I'll put the two side by side for the comparison the next time i meet up with him. But i estimate around 2 to 3 camera stops with a nikon f1.8 lens attached
 

It should be quite simple, but does involve removing the adapter of course. You point the cam at a fixed subject and adjust the aperture until the zebras just start to appear on highlights. If you do this with and without the adapter, the difference in the aperture settings is a measure of the light loss. No rush, but would be great if you could try it sometime, thanks.
 

Thks for the review. I do agree yr footage looks pretty good. Even in those dark inhouse situation.. My question will be how will the Letus FE perform with HDV cameras.. that a lot more demanding and harder to escape if your footage is not sharp. Do let us have a look at yr rig once is fully setup.

BTW are you on FCP? 25P for the footage?

Thks so much for sharing guys!
 

This is the letus economy, which is seperate from the Letus FE. The main difference is the light loss, however it is *supposed* to be sharper. I've never used the letus fe, so I can't comment on it. However, Letus does not make an SD and HD version, instead the version they sell is compatible with both SD and HD cameras. David has some test footage shot with the canon H1, so if you force him to upload it, you'll see how it looks like on HD - however, that test wasn't very good, as it was the first time i tried out the adaptor, and as such it was totally uncalibrated. Maybe I'll do more tests in future, if i get my hands on the camera again. www.dvxuser.com is also a veritable treasure trove of information regarding this, and there has been alot of footage posted from the economy's bigger brother - the letus extreme. The tests look great so far, so I doubt you should have any worries.

Oh and I'm on adobe premiere 3.0, and I shoot with a DVX, so its 25p footage. None of the footage has been color corrected or modified in any way, though. Heck I didn't even edit it - just dumped my tape there. lol.
 

ah I see.. haven been checking out the footages at DVX. I dun own one.. Hmm Premiere does a good job at the outcome. I think the 25P plays the biggest part :) Footage from a H1 would be nice to chk out.. Looking forward to the fully setup rig. Have fun!
 

I've uploaded another test video on my site under "TEST FOOTAGE"

www.fps.carbonmade.com

This time I've tired zooming and all, I made a mistake and zoomed out abit too much in one of the shots - you'll notice the vignetting.

Besides that I'm quite happy with the new settings and little adjustments I've made on camera and on the adaptor.

Let me know what you think.
 

How much lighting did u add to the room Hobbes?
 

Shot a really really hectic video in little India today with the Letus Economy and nikkor f1.8 50mm lens. I found it manageable to work with the adaptor despite the extreme run and gun situation that we were working under, and this baby can almost see in the dark! David was shooting on a clean DVX with in camera aperture at f5.6. I was shooting with the letus, and with the lens at f1.8, I got similar exposure at around f4 in the camera!
 

f5.6 to f4 is pretty good considering the amount of stuff on the end of the camera. Thanks for the info Malcolm. Run and gun? How's your biceps nowadays? :)
 

Terrible. 4 hours running around little india with 2 cameras, one of them with letus attached, a video tripod, a D80, and a couple of lenses.

If you're interested, I managed to shoot alot of the footage at f4 on the lens while in the bazaars - under the tent, with many many people. I controlled the exposure with my camera. Very seldom did I need to stop down to 1.8 on the lens, and that was only when the lighting was terrible.
 

Ha ha, sounds like you had a lot of fun. Are you shooting for a new project?

f4 on the lens is pretty reasonable. I know the purpose of the adapter is to narrow the depth of field, but it is also good to have some margin for focussing while moving around. If you are opened up all the time it would be quite tough.
 

Yeah. Besides, any lens at f4 blows the depth of field of the stock lens out of the water. Also, that's the sweet spot for most lenses, and the highlights tend to 'ghost' and 'smear' a bit when the lens is at wide open. f4 is the best aperture setting to use as you get a sharp picture from the lens, no vignetting, and the aperture isn't closed down enough that the gg pattern is visible. Not to mention you get some beautiful, solid bokeh a this f stop.

Oh, and it was a paid gig. Just some event coverage thingum - took a risk by using the letus...hope my footage turns out sharp. But then again we had like a 100:1 shooting ratio: no, really, we did. 4 hours for a 5 min video. There should at least be some usable footage there.
 

OK, thanks again for the info Malcolm.

What lenses do you have for the Letus, and how many are you planning to get eventually?
 

Currently have a 50mm f1.8, a 50mm f1.4 (david has an extra one), a nikkor 80-200mm f2.8, nikkor 24-125mm f3.5-5.6 (old nikon stock lens) and a 105mm f2. Most of these lenses I have because of my dad's still photography hobby, but I'm too afraid to use the still photog lenses until my rails come in....should be any day now....wonder what's taking those buggers so long. I'm hoping to get a 28mm lens (as fast as possible), and an 85mm f2. Then I shall be happy.
 

Wow, quite a collection. Yes you really need the rails to be safe. Hope you get them soon.

28mm lens will be great for video, I love shots with wide lenses that have the camera moving in pretty close. Apart from the DOF, that would be my biggest incentive to get a 35mm adapter.
 

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