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Digital back for Mamiya C300 and other cameras
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PostPosted: Sun Mar 22, 2020 3:04 pm    Post subject: Digital back for Mamiya C300 and other cameras Reply with quote

I came across this idea on the internet. A digital back system for medium format cameras. A two part system, one a back adapter, the other part is a digitiser.

(see here https://www.kickstarter.com/projects/samellos/im-back-low-cost-medium-format-digital-)

The digitiser is basically a camera which focuses on a screen held in the film plane. I'm wondering if this could be recreated using a GoPro?

PostPosted: Sun Mar 22, 2020 5:28 pm    Post subject: Reply with quote


Technical features:

Sensor: 16Mega CMOS Sensor Panasonic MN34120
Processor: Nt 96660
Picture System: Focusing screen
Video Resolution: UHD24(2880*2160) QHD30(2560*1440)
108OP60/30 720P120/60/30 VGA240
Video aspect: Focusing screen/Vintage
Picture Size: 20M 16M 12M 10M 8M 5M 3M VGA
Video Format: MP4 H.264
Picture Format: JPG Color/Sepia/B&W & RAW (Black&Withe)
Storage Capacity: Micro SD Max 128Gb
USB Interface: USB TYPE-C
Display: 2.0″capacitive touch screen
ISO: 100 - 3200
Auto White: yes
Balance: yes
Auto Eve : yes
Picture ip: yes
WIFI: yes
Remote: yes
Battery: 3.7V 2.700mAh

GoPro would be less resolution, less expensive, more work required.

PostPosted: Mon Mar 23, 2020 12:06 am    Post subject: Reply with quote

I've got one sorted, but a Fresnel screen would be better. It looks basically like one of those neg scanners that use a camera inside. Incidentally the information about this states that it has a gopro size sensor.

PostPosted: Mon Mar 23, 2020 12:46 am    Post subject: Reply with quote

If you, basically, shoot the GG of a medium format camera then the GoPro resolution would be more than enough. The GG resolution won't be more than 2mpx. and you should expect some artifacts from the fresnel lens, too.
Look at how a GG image of a 4x5 LF camera looks like and consider a 6x4.5cm (or 6x6-6x7-6x9) part of it.

Not very promising, IMO. But, of course, it could be a lot of fun in using it.

PostPosted: Fri Apr 03, 2020 3:21 pm    Post subject: Reply with quote

My go pro adaptor works fine but the screen has to be a fresnel lens. Ground glass just has a hotspot and is pretty useless.