[HN Gopher] Pieca: A Raspberry Pi Camera System for Leica M Moun...
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Pieca: A Raspberry Pi Camera System for Leica M Mount Lenses
Author : SanjayMehta
Score : 111 points
Date : 2022-11-05 08:20 UTC (14 hours ago)
(HTM) web link (teaandtechtime.com)
(TXT) w3m dump (teaandtechtime.com)
| nmstoker wrote:
| The project shows serious dedication, it's impressive.
|
| When they become more widely available would be interesting to
| consider upgrading to something like the 64mp Arducam:
|
| https://www.arducam.com/64mp-ultra-high-res-camera-raspberry...
| cunidev wrote:
| It is shocking how much the glass affects the quality of
| pictures. Given the relatively humble sensor used on this build,
| results are still almost pro-level.
| JKCalhoun wrote:
| Very cool. Now if I only had a collection of Leica M-mount
| lenses...
|
| I'd like to try to do something similar with Micro 4/3.
| anta40 wrote:
| Well you don't have to use Leitz lenses. Zeiss, Voigtlander
| also make M-mount lenses. Overall excellent and much more
| affordable.
|
| Also, Leica screw mount lenses + M39-to-M adapter is also a
| great option :D
| jnovek wrote:
| I suspect you're being facetious, but there are several 39mm
| screwmount lenses from the former Soviet Union that can be had
| for less than $100 (often much less) and offer excellent
| rendition for the price. It's how I can afford to shoot a
| rangefinder on a shoestring. :-)
| epicide wrote:
| Largely off-topic, but I've had so much fun and luck getting
| old lenses to use with my mirrorless camera[0]. I've been
| able to get several lenses from random brands for an average
| price of like $15 apiece. Mirrorless cameras work especially
| well with those lenses because the adapters can be made very
| simply and usually had for like $10.
|
| Are they gonna get you the "tack sharp" sports and wildlife
| photos like a high end lens of today? Hardly. But retro and
| lofi photography styles are pretty popular right now and are
| a blast! Why spend $200+ on some wacky retro-inspired lens
| when you can get a real vintage lens for less than 1/10th of
| that? Probably built better too[1].
|
| The biggest potential drawback is a lot of these don't even
| have an option for auto anything (focus, aperture, etc.).
| Even if you get one that has it, the auto function likely
| won't work with any digital camera body[2].
|
| Personally, I've actually grown to _prefer_ manual focus in
| most cases and I shoot in aperture priority 99% of the time
| anyway. These have become my main lenses for now. Paired with
| Fuji 's film simulations, I get decently close to aspects of
| the film experience but with modern benefits[3]. I'm not
| gonna get perfect color representation, but that's honestly
| what I'm aiming for anyway.
|
| If I really need autofocus[4] or want a shot without my retro
| "filter", I can always use my phone.
|
| [0]: A used Fujifilm X-T30 mk1
|
| [1]: Even if it's just due to survivorship bias.
|
| [2]: A lot of the old mechanisms for things like autofocus
| would be like a specifically placed worm gear. These adapters
| usually don't engage those mechanisms.
|
| [3]: As much as I like the restriction of having limited
| shots and not knowing what it'll look like til later, it's
| still a steep cost. On top of that, it's hard to even trust
| the in-camera light meter as many were designed for mercury
| batteries. I've been able to use modern hearing aid
| batteries, but the voltages aren't exact matches, so the
| readings are slightly off.
|
| [4]: Even though I like manual focus, handing my mostly
| manual camera to a non-photographer family member always
| requires a mini photography lesson, for better or worse.
| formerly_proven wrote:
| Why are there no sensors other than the IMX477 available for the
| raspi? There's a plethora of CSI sensors, yet all aftermarket
| boards use this one. Is the RPi locked to use only that
| particular sensor?
| [deleted]
| nakedrobot2 wrote:
| because broadcom doesn't release their ISP documentation.
| mschuster91 wrote:
| IIRC the problem is you need to bake in support for CSI sensors
| into the firmware itself, and for that you need datasheets...
| CSI is only the communication interface, not the protocol - for
| webcams, UVC exists on top of USB, but embedded doesn't have
| that luxury.
| atoav wrote:
| Using the sensor with existing, working software support is
| easier than one without it I guess?
|
| Not anybody is able to take a modern sensor and make it work
| with just any device. If you are the type of person who both
| _can_ do that and is _willing_ to do it, the whole community
| would definitly be grateful.
| hamandcheese wrote:
| > For this, I want to use heat-set inserts and screws to clamp
| everything together relying less on super glue to hold things
| together.
|
| There is actually no need for heat-set inserts, you can print
| holes sized such that standard machine screws will cut their own
| threads. I've done it with M2, M2.5, and M3 sized screws.
|
| Heat-set thread inserts are nice, though, if you will be doing a
| lot of re-assembly, since they aren't so easy to strip.
| justincormack wrote:
| Leica M lenses are not ideal for this size sensor, hence the
| reducing lens. 16mm cine lenses are C-mount and work nicely,
| maybe 8mm/super 8 D-mount not tried, it all depends on the sensor
| size you use and focal length you want.
|
| I use Mokose UVC webcam https://www.mokose.com/collections/hd-
| cameras with vintage 16mm cine lenses, there are some nice lenses
| available.
| FeistySkink wrote:
| There aren't many reviews of these Mokose cams. How does the
| image quality compare to a mirrorless/DSLR in terms of white
| balance, color reproduction, etc.? It seems to compare
| favorably to the usual awful Logitech IQ.
| justincormack wrote:
| Yeah I have been meaning to do a review I bought them having
| not seen any, I have two of them. The UC80 (IMX485, the most
| expensive one) is really good, its still a smaller sensor
| than DSLR (1/1.2 inch, similar to 16mm film) but hugely
| larger than normal webcams. The auto settings are really
| good. The UC70 (the one thats $165) is not as good its a
| smaller sensor and has some limitations.
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