Comments on: On-board focus confirmation for the Canon Digital Rebel http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/ Fresh hacks every day Sun, 12 Feb 2012 02:22:53 +0000 hourly 1 http://wordpress.com/ By: Koray http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38046 Tue, 01 Jul 2008 01:16:38 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38046 hi rasz, I think it just informs the camera what is connected (i.e., focal length: 50mm maximum aperture:f/2.0). You can order these chips on ebay and even ask for a specific focal length and aperture value pre-programmed for you. even more, there is this dandelion type for olympus cameras, which can be reprogrammed by the user on the go (i don’t know how). Before the proliferation of these chips/adapters, manual lenses (i.e. M42, Zuiko, Nikon ones) were cheap as peanuts. Now the prices are going up and up… Amazing. Cheers, K.

]]> By: rasz http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38045 Mon, 30 Jun 2008 11:33:26 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38045 thanks for the info, the one you linked is reprogrammable
the one you used looks just like a 6 pin SOT-23 serial eprom (34VL02 ?).
Do those chips talk to camera (two way) or just inform the camera what is connected (like SPD on RAM chips in PCs)?

]]> By: Koray http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38044 Mon, 30 Jun 2008 10:35:01 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38044 Hi rasz, I don’t know what type it is, but all it does is to communicate with the camera through a serial connection and report a lens focal length and maximum aperture value. It is basically simulating the original controller chips inside EF lenses. There is not much documentation on this, but there is one commercial website with some info, you may be interested:
http://www.birger.com/Merchant2/merchant.mvc?Screen=ef232_home

Cheers. K.

]]> By: rasz http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38043 Mon, 30 Jun 2008 08:50:09 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38043 so the chip is just an serial flash rom?

]]> By: Luke http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38042 Mon, 30 Jun 2008 03:34:25 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38042 koray, very nice work, it looks like it turned out well for you.

]]> By: Koray http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38041 Mon, 30 Jun 2008 01:16:33 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38041 :-) Thanks guys, it was fun.

]]> By: Shadyman http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38040 Sun, 29 Jun 2008 22:49:29 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38040 Will,

The 300D is the original Digital Rebel… The 350D is the XT. Just FYI :)

]]> By: alex mccown http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38039 Sun, 29 Jun 2008 18:56:15 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38039 yah Koray nice one 5/5

]]> By: BlizzardDemon http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38038 Sun, 29 Jun 2008 17:32:32 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38038 @ Koray Congratulation, awesome job on your hack!

]]> By: Koray http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38037 Sun, 29 Jun 2008 15:51:09 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38037 YAY! I made it to hack-a-day! :-)

]]> By: Alex McCown http://hackaday.com/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/comment-page-1/#comment-38036 Sun, 29 Jun 2008 15:03:28 +0000 http://hackaday.iheartcashews.com:8181/2008/06/29/on-board-focus-confirmation-for-the-canon-digital-rebel/#comment-38036 im a Nikon guy (D40) but he must of had balls of tungsten to open up his rebel :-\ any who this is a nice hack i had no idea u could add that :-)

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