[Elphel-support] Canon EOS to C-Mount adapter

[Oleg]

Lavrentiy,

Here's a link to an adapter that also should work with a canon EOS mount
lens:
http://www.amazon.com/EzFoto-C-Mount-Adapter-Camera-cameras/dp/B0063X8RN0/ref=sr_1_5?s=electronics&ie=UTF8&qid=1349824442&sr=1-5&keywords=canon+mount+c+mount

Best regards,
Oleg

On 4 October 2012 11:56, Oleg <support-list at support.elphel.com> wrote:

>
> How can I use Canon lenses (EOS) with Elphel 353?
>>
>> **
>>
>> I only found EOS to C-Mount 16mm adapters on ebay and amazon, but as I
>> see, Elphel 353 has 25mm connector.****
>>
>> http://www.amazon.com/Kipon-Canon-Mount-Lens-Adapter/dp/B004THUG6Icurrently unavailable, actually for a long time.
>> ****
>>
>> **
>>
>
> The C-mount is a standard. The adapter you found will work.
>
> However, because of the crop <http://en.wikipedia.org/wiki/Crop_factor> you
> will get a smaller field of view and the canon lens will arguably provide a
> better quality than a 1/2.5" format equivalent (same FOV but for 1/2.5").
>
> Here's what we usually reply about selecting lenses:
>
> We use the Micron 5 Mpix Sensor in Elphel cameras, format 1/2.5" (7mm
>> diagonal) so the lens has to be 1/2" format.
>
> The standard lens we recommend with Elphel cameras is 3Mpix Varifocal lens
>> H3Z4518CS-MPIR.
>> However you are welcome to choose lens, for example from:
>> http://www.rmaelectronics.com/lenses.htm
>> just keep in mind 1/2" or 1/2.5" format of the lens, that is compatible
>> with the 5Mpix Aptina sensor in Elphel cameras.
>> Lens manufacturers specify (when they do) "megapixel" resolution for the
>> full lens format. Let's consider the 2/3" format lens that claims to be "5
>> MPix" (HF12.5SA-1 http://www.rmassa.com/manu/fujinon.htm ). 2/3" format
>> corresponds to the image size diameter 11mm.
>> The sensor we use has diagonal of 7.1mm, so let's see how many pixels out
>> of 5MPix will get to the sensor:
>> 5Mpix*(7.1mm/11mm)^2 ~=2.1Mpix
>> So we need to have "10 MPix" 2/3" sensor (there are some new ones, about
>> $700) to nearly match the sensor (will still be some 4.2MPix, not 5).
>> With 1" (16mm diagonal) things will be even worse.
>
>
> Best regards,
> Oleg Dzhimiev
> Electronics Engineer
> phone: +1 801 783 5555 x124
> Elphel, Inc.
>
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