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Julian

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Posts posted by Julian

  1. Not necessarily. Over the years sensors get better. The current 16 megapixel Sony-sensor has been around for about 3 years. It has improved since, but it's still based on the same design (I suppose). A new sensor generation can improve both resolution and low light performance.

     

    The current 16 and 24 megapixelsensors are much better in low light than the 6 or 8 megapixel sensors the same size from a decade ago.

  2. Just went out to shoot some bright lights. It looks definitely different because of the mirrors. A lot of reflections going on, interesting effects.

     

    http://www.youtube.com/watch?v=0NOfNhRDz8U

     

    Good thing is, I used the Konica Hexar 40mm f/1.8 for this clip (at f/1.8) and it works without vignetting!

    Shot on Panasonic GH2, unhacked @ iso 3200.

     

    Also, the focus seems fine from about 2 meters distance without diopters.

  3. According to rumors the upcomping Sony A58 will get a new 20MP sensor.

    This will probably replace the current 16 MP sensor and I would expect new NEX camera's will also get this sensor (except for the NEX-3N, which will be released soon with the current 16MP sensor).

     

    I'm really curious how this new 20MP sensor will turn out. I hope it will be as good, or better, than the Toshiba 24MP sensor in de Nikon D5200 for video.

     

    A NEX-5R or NEX-6 replacement with this new 20MP sensor would be great if it is on par with the Toshiba-sensor. Especially combined with the speed booster.

     

     

  4. Somewhere last year I stumbled upon a lot of Delrama 8 CP 1,5 lenses, made by the Dutch company Old Delft.

     

    gallery_20742_24_604317.jpg

     

    A tiny fixed focus 1,5x anamorphic for 8mm camera's. It uses curved prisms and mirrors instead of cylincrical lenses. I bought them with some diy projects in mind...

     

    gallery_20742_24_435953.jpg

    Sadly, the Delrama's are in pretty bad shape, as you can see. It isn't fungus, it is the silver on the mirrors that is detoiriated. You can't clean it, you'd have to redamp the mirrors to fix it. I never really looked into it, since it seems an expensive process.

    So they have been lying around here for a while... Today I decided to experiment a bit more with them. The Delrama's have a screw mount that is exactly the same size as a C-mount lens. I don't have any lenses where I can fit it onto directly, but since it's so small and light, I decided to sacrifice a simple plastic lens cap from one of my Minolta's. I cut a hole into it, just large enough to fit the filter thread. It holds the Delrama pretty well.

     

    gallery_20742_24_320118.jpg

    gallery_20742_24_310939.jpg

    gallery_20742_24_25400.jpg

     

    On the last picture it is attached to my Minolta 58mm f/1.4. It seems to need a pretty long lens. With the 58mm and the GH2 it works fine, but on my 35mm it's like looking trough a tunnel.

     

    I also 'modified' a Computar 25mm f/1.8 C-mount lens. I superglued a C-mount extension ring to the inner part of the lens barrel (that doesn't move while focusing). I loosely screw the Delrama on top of that, align it and then tighten it with the little clamp.

     

    gallery_20742_24_269889.jpg

    gallery_20742_24_463435.jpg

     

    This results in a tiny anamorphic combination, but it only works in EXTC. Also, I think I'll have to modify the Computar lens, since it doesn't quite focus to infinity. It's a funny little combination though.

     

    I took the Anamorphic Lens Cap and the Computar Anamorphic out for some test shots:

     

    http://www.youtube.com/watch?v=DfV0xHHhQUU

     

    In hindsight I should have used a profile with more contrast, this was all shot at smooth -2-2-2-2. The damaged Delrama's probably make the image even flatter. But the light was already pretty flat.

     

    I have no idea how it would compare to a Delrama in pristine conditions, but even with the damaged mirrors these liltle ones still look usable in some way. It is nice to be able to rack focus them.

     

    I'm not sure what the minimum focus distance is. I read 4 meters somewhere, but I think it's closer to 2 meters. I also tried holding some diopters in front of the lens, with a +1 diopter I could focus at 0,5 meters.

  5. My wannabe Henri Chrétien then ;)

     

    I can still align the lens with a step down filter. See the pictures, there is a 'clamp' included.

     

    Thanks for the eBay link, sadly it's not available anymore but I'll send a message. And I'll know where to find Tony if it doesn't work out. I'm already a happy customer, got a Redstan clamp for my Kowa.

  6. Yep, i'm officially the happiest man on EOS HD right now.. Thanks Tony :)

    I'll treat my baby Henri Crétien with great care and love.

     

    As far as I've seen the look it gives is pretty clean. I pointed some bright led torches at it, it flares, but not exactly mega flare. Seems to depend more on the taking lens.

     

    I need to find a proper way to attach it to a lens now... hand holding it just doesn't cut it.

     

    The adapter has a thread that is just a little smaller than the 25.4mm C-mount. If I put it in my C-mount adapters it just fits in loosely. I suspect it's something like ~24.5mm (could it be 24mm? I found some B&W filters in 24mm). Or is it measured in one of the 'series'?

     

    It must be some standard thread size since it was supposed to be used on a Bolex H16 (at least, according to the seller). I can't find any info on filter size for Bolex lenses, it seems like they used gel filters then.

     

    The easiest way would be a step down filter. Anyone know a place where they have those in odd varieties? The smallest step down I can find goes to 37mm.

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