superpat999
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Raspberry Pi Camera Board with CS mount Lens

Wed Nov 20, 2013 10:19 am

Hi,

I did a search for threads on this, but I could not find one. ( If there is already a thread, please point me there!)

http://www.uctronics.com/raspberry-pi-c ... rrency=GBP

£19 plus import VAT

It is manufactured by a company called Arducam
http://www.arducam.com

Arducam have a distributor in EU (Watterott, but they do not stock it yet)

It is on sale on ebay.

Has anyone tried it yet?

regards

jamesh
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Re: Raspberry Pi Camera Board with CS mount Lens

Wed Nov 20, 2013 10:43 am

That's quite interesting. I think that may infringe on some Raspi trademarks, but would be interesting to try one. The only difference appears to be the lens. But I would be concerned about vignetting since a different lens requires different parameters.
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0xFF
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Re: Raspberry Pi Camera Board with CS mount Lens

Wed Nov 20, 2013 10:50 am

Sample images would be useful..

snazbaz
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Re: Raspberry Pi Camera Board with CS mount Lens

Fri Jan 03, 2014 11:13 pm

I have received one of these. Here's a comparison pic:

http://www.flickr.com/photos/[email protected]/11739970255/

It works. Comes with a lens, nothing written on it so not sure what specs yet. Will do some tests on it and post them up soon.

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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 10:08 am

Does the PCB have any reference to the Raspi Pi itself on it? Cannot tell from the picture.
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snazbaz
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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 10:18 am

It has Raspberry Pi Camera printed at the bottom

jamesh
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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 2:31 pm

snazbaz wrote:It has Raspberry Pi Camera printed at the bottom
Oh dear. I believe that's a breach of trademark, I thought that had been sorted.
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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 4:37 pm

jamesh wrote:
Oh dear. I believe that's a breach of trademark, I thought that had been sorted.
Indeed.

ACTIVATE THE LAWYERS!

Or, we would if we had any. You'd be surprised how much trademark infringement can be dealt with by a nice, politely worded letter printed on dead tree format with the postman requiring a signature.
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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 4:40 pm

What happens when the folks you write to reply with a reference to the reply from Pressdram in the case of Arkell vs Pressdram, 1971?

I'll let you look it up.
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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 4:50 pm

Wow, just purchased this camera this morning. I did not see this thread before making the purchase.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... OC:US:3160

poing
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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 5:44 pm

I wonder how they tackle the shading for the original lens that's build into the firmware; using Nikon lenses you get an enormous fault because the shading isn't necessary but still applied. I guess the same is true for any non-standard lens, so the images are sub-par.

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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 5:45 pm

DougieLawson wrote:What happens when the folks you write to reply with a reference to the reply from Pressdram in the case of Arkell vs Pressdram, 1971?

I'll let you look it up.
Thanks for that - I needed a chuckle!

snazbaz
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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 5:50 pm

poing wrote:I wonder how they tackle the shading for the original lens that's build into the firmware; using Nikon lenses you get an enormous fault because the shading isn't necessary but still applied. I guess the same is true for any non-standard lens, so the images are sub-par.
Have you got an example image with a Nikon lense?

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Re: Raspberry Pi Camera Board with CS mount Lens

Sat Jan 04, 2014 5:54 pm

For some early examples you can look at this thread: http://www.raspberrypi.org/phpBB3/viewt ... lit=+nikon

I did get better results using raw in the mean time and I concluded the typical sensor I used has a problem (strange behavior on the right side). I'm getting ready to use another camera board but have been busy with more pressing matters.

jamesh
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 10:20 am

DougieLawson wrote:What happens when the folks you write to reply with a reference to the reply from Pressdram in the case of Arkell vs Pressdram, 1971?

I'll let you look it up.
Then THE LAWYERS ARE ACTIVATED. (and Liz is trained that way...)

If you don't defend a trademark, you lose it. It's not being malicious or mean to stop the use of the Raspi name without permission, as some seem to think, but down to the fact that if one person gets away with using a registered trademark, then everyone can then get away with it.
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 10:46 am

Just dropping this link here:
http://www.raspberrypi.org/trademark-rules

snazbaz
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 4:07 pm

Some more photos of the module here:

http://www.flickr.com/photos/[email protected] ... 438354505/

The lens that comes with it is pretty rubbish, got some tests shots to crop and upload later.

The mount/board/sensor seem good to me though.

snazbaz
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 6:19 pm

So here's some pictures. These are all a bit rough as the lens is basically not very good so not worth a detailed comparison.

This is a picture of my ceiling with the camera flat on a desk facing up.

Image

Notice the top ~20% and bottom ~30% are soft, but it's ok to the sides. This is a fault with the lens and is present in any scene. If I rotate the lense the blurry bands move. I am going to order in a different CS mount lens to try out with this board.

Here's a PI camera shot from the same spot for comparison:

Image

Here's a shot out the window with the CS board.

Image

And here's one with the official pi board:

Image

Here's a shot of a window sill with a book at the end perpendicular to the camera, notice the text on the bottom of the book cover vs the top.

Image

And comparison shot from the pi:

Image

snazbaz
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 6:21 pm

Forgot to add, here's the same shot of the ceiling but with no lens attached at all:

Image

jamesh
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 7:17 pm

Hmm, that lens really is a bit pants.
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 7:17 pm

I don't think the lens is necessarily bad but rather that the sensor is not mounted perpendicular to the lens, so you have the Scheimpflug principle heavily at work. See: http://en.wikipedia.org/wiki/Scheimpflug_principle

Until you find a way to solve this problem, adjust within micrometers of the ideal situation, buying other lenses is wasting money. Needless to say the package shouldn't have been sold in this state. I also see the shading effect, where the corners are lighter than the center because the lens has less vignetting than the original Pi Camera.

snazbaz
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 7:28 pm

poing wrote:I don't think the lens is necessarily bad but rather that the sensor is not mounted perpendicular to the lens, so you have the Scheimpflug principle heavily at work. See: http://en.wikipedia.org/wiki/Scheimpflug_principle

Until you find a way to solve this problem, adjust within micrometers of the ideal situation, buying other lenses is wasting money. Needless to say the package shouldn't have been sold in this state. I also see the shading effect, where the corners are lighter than the center because the lens has less vignetting than the original Pi Camera.
Do you know a test I could do to prove whether it is just the lens or if it is a mounting alignment issue?

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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 8:04 pm

The shot through the window is telling. You have three layers in the depth of the image; the window, the tree and the houses across the river. You can see the plane of focus extending from the top of the window through the underside of the tree to the quay. The plane of focus should be parallel to the sensor but it sticks out almost at a 90 degree angle!

It is possible that either the lens, an element of the lens or the sensor is misaligned. My bet would be the sensor as these lenses are generally sold (I think) and if this was normal quality the company would be out of business real soon. I'd check if the sensor is maybe loose.

What I did with my Nikon lenses is mount the camera board with tiny springs around screws and then adjust the screws until the whole image was in focus.

snazbaz
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 8:12 pm

Ah I didn't notice how the top right of the window was actually in more focus than the bottom. Makes sense now. I can loosen the mounting and it'll probably move a tiny amount so I'll play with that when I have some time see if it can get it looking better.

jamesh
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Re: Raspberry Pi Camera Board with CS mount Lens

Sun Jan 05, 2014 8:22 pm

Check to see if the sensor itself is firmly mounted to the PCB (and flat wrt the lens)
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