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Old November 17th, 2006, 03:53 PM   #1
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The perfect 35mm adapter?

With many adapters now on the market what separates them from one another. MINI35 and MOVIEtube are both robust, have 15mm and 19mm rod support, battery mount for supply to adapter, power out to external devices (viewfinder, LCD etc), BNC, robust carry handle, shoulder support, FF support and are built like a tank, well the MOVIEtube anyway, MINI35 is a little delicate for my liking. (inspected one this week)

On the otherhand the MINI35 requires a different £1,250 camera support for each camera and no universal battery mount (differs with each mount, many be a good thing for some but then there is the expense of a different battery for each mount)

One major flaw for both is the price £8,000+ for each, then there are the add ons and different mounts.

Then there are the DIY adapters: SG Pro, M2, Letus, Brevis, GO-35. These are very popular, great value for money as they offer the same quality images as the MINI35 and MOVIEtube plus they offer universal camcorder mounting (almost) but like the MINI35 and MOVIEtube they have their disadvantages; robustness, no additional connections, no adequete battery support.

Most of the people who buy the DIY adapters are probably film making enthusiasts and not production companies (although not for me to say).

With the 35mm adapters become more and more popular is it time for the DIY adapters to step up and move closer to the MINI35 and MOVIEtube pedigree?

What makes the perfect 35mm adapter, besides low cost? Your thoughts please.....

This thread is in no way a put down for commercial DIY adapters, but by people stating what they think would make the perfect 35mm adapter may assist DIY designers help improve their current products. Keep up the good work DIYers.
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Old November 17th, 2006, 04:49 PM   #2
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One that doesn't absolutely EAT light.
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Old November 17th, 2006, 04:56 PM   #3
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Light loss seems to be the hate for all that use 35mm adapters but when filming shouldnt professional lighting be used anyway? Using redhead, brunette or blonde lighting should help this in some way. Are people using 60w light bulbs from their table lamp or something?
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Old November 17th, 2006, 05:06 PM   #4
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For the DiGi35 I am looking to incorporate a V-mount, Viewfinder out, Fischer 2 Pin, 2 x 4 Pin, BNC and also a DC to DC convertor to enable 18-36v down to 12v
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Old November 18th, 2006, 05:43 AM   #5
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The problem with light loss is serious in that it may prevent the use of practical lighting. For instance, many digital camcorders can get a decent image of a nightime city skyline. If you want that skyline in your background with a 35mm adapter that loses two f-stops, you are out of luck. All the studio light in the world won't bring back a city skyling, or any such background, that an adapter gobbled up in the ground glass.

I used the Sony FX1 that has decent light sensitivity on a night shoot and not even a half stop of light loss would be acceptable. Fortunately, a 35mm adapter may not be necessary in these circumstances since it is easy to throw a cityscape out of focus. On the same shoot, we wanted to throw the businesses across the street out of focus but it wouldn't work. The trick of moving the camera backwards and zooming in had the double hit of reducing the angle of view and closing the lens down as we zoomed. We had to frame our shot in such a way that it almost was ruined.

Sometimes, good light sensitivity and shallow depth of field must be used together...
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Old November 20th, 2006, 10:32 AM   #6
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Just a quick question about the Nikon BR-3 mount. What the cheapest but good lens to use with this? A friend of mine is making a DIY adapter after reading about them on DVinfo. I havent actually really tested the nikons so dont know what works well, Ive been using ARRI T1.3 zeiss lenses. He has a small budget for the lens, any advice?
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Old November 20th, 2006, 10:38 AM   #7
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My Lowell DP kit isn't exactly top of the line, but I wouldn't compare it to a table lamp either.....

Blasting the subject with light in a music video shoot, I still had to have the iris wide open, and then my range of what could be in focus was nil. Just not ideal in my opinion.

Granted, this one of the DIY adapters, and I thought the image was spectacular, but the light loss was just too great at this point.
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Old November 20th, 2006, 11:01 AM   #8
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Wade, that's precisely why the Brevis is designed for multiple diffusers, swapped by users. The standard diffuser has extremely low light loss (.5 to .7 stops with an f1.4 50mm attached), while diffuser option 1 and now, diffuser option 2, go up from there.

I just did my first tests with diffuser option 2 which I'm completely ecstatic about. Light loss is the greatest, (1.5 stops or so) but the emulation of film bokeh at those wide open apertures is going to make a lot of people very, very happy. I was expecting a hit in terms of sharpness, but this one may actually be right on par with the standard diffuser...which is very crisp. I'll wait until the xh-a1 shows up (this week?) to post some HD clips. Based on what I'm seeing, the combination of option 2 diffuser, XH-A1, and the Lomo 85mm cinema lens in front of me, is going to drop some jaws.
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Old November 20th, 2006, 02:15 PM   #9
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Most important factors:

1:Sharpness
2:Light loss
3:Build quality

So far the letus35 FE let me down very badly, failing in all of the major three. My Redrock M2 has impressed in all of the above areas. I hear quotes of .5 stop light loss, but I think it is a little more than that. My Brevis from Dennis arrives this week and I cannot wait. I have heard that all the three points are very well served plus it has a great 20hr rechargable battery built in, is lightweight and can be used without rods making handheld more possible.

Today I shot 3 interviews for a doco series for Channel 4 and also some nice sequences and shots to go with them on the M2. Outside was nice and easy, but inside the House of Lords with limited space, time and a very large dark hallway it was tough. DOF was down to about 2 inches on my nikon f1.2 stopped down to about f1.4 and 9db gain. I was focusing pulling the entire way through it. Fortunately it looks great. I am having to use my XDCAM for more spontaneous stuff, especially inside as the need for light makes the adaptor nearly impossbile with strong lights.

How far have you got Tony with your design, when do you think i will be able to meet up with you to have a look? Are you still planning to make the image flip? It would be nice but as light loss is so important perhaps you should go down Dennis' route of making it a screw on addition rather than built into it so you can take it off if you need that extra stop, which inside you invariably do! As you know London right now is bloody dark and any natural light that was coming into windows a couple of months ago is long gone!!!
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Old November 20th, 2006, 11:54 PM   #10
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Phil, we're certainly not perfect, but a ton of effort goes in to keeping everyone happy :-)
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Old November 21st, 2006, 05:30 AM   #11
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Phil.

There was a UK Channel 4 crew out here for the 2006 Red Bull Air Race final. I was fortunate enough to be on the outside of the fence where they shot a to-camera with rapidly approaching aircraft as a backdrop.

I don't know whether they worked a deal with the pilots or not, but I was lucky to harvest the low fly-towards and sharp pull-ups with the 500mm end of a zoom lens - sweet.
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Old November 21st, 2006, 09:09 AM   #12
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Cant seem to find a decent Nikon Nikkor 50mm f1.4 anywhere. Anyone got one to sell or know where to get a decent one? Tried eBay but no good (statches and dust).
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Old November 21st, 2006, 09:27 AM   #13
 
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it looks like jvc is about to release their 35mm lens mount adapter for the HD100/110/200/250. I think this adapter uses mirrors rather than ground glass focusing screens. If this is true, the light loss should be minimal. The only problem will be adapting to the 1/3" lens mount used by JVC.
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Old November 21st, 2006, 09:38 AM   #14
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Anyone got the web link for this JVC 35mm lens mount adapter?
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Old November 21st, 2006, 09:59 AM   #15
 
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http://www.dvinfo.net/conf/showthread.php?t=78280
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