Four years of blogging…

September 24, 2008

Today marks the fourth anniversary of writing my first blog post on my original blog.  It’s been a bit of a crazy four years with lots of different things going on.  I didn’t even post anything to my blog for these past few years.  But hopefully, I’ll be able to now keep this blog updated at least once a day, and finish up recreating the old blog posts which has been a slow process.

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35mm DOF adapter lenses…

September 24, 2008

As I mentioned in my previous post, I’m planning on using an old Canon FD lens I have for the 35mm depth of field adapter I’m building.  However, I’d like to talk a bit more about these lenses, and how they can be quite useful for DOF adapters.  Canon FD lenses were mostly built back in the 1970′s before auto-focus and auto-exposure were really developed.  So, pretty much every Canon FD lens allows complete manual control over both focus and exposure.  This is really nice as newer style lenses with electronic controls can be an issue as you won’t be able to do much without manual control (the camcorder’s lens will be focused on the ground glass, and you should not be adjusting exposure from the camcorder).  The other nice thing about these lenses is the fact that they are old and incompatible with current Canon DSLRs which, in combination, keeps the price low when buying them on eBay.  I picked up a really nice 50mm f1.4 lens for about $50 this week.  Comparable Canon EF lenses are much, much more expensive.

Now, when following Daniel’s 35mm Adapter tutorial, you will need to change a few things.  You will need to get a Canon EF to FD adapter to fit on the end of the cheap extension tube.  Look for one without the glass element as you won’t be needing that part. You will also need to change the distance between where the ground glass sits in the tube and the edge of the back of the lens.  Canon FD lenses have shorter flange focal distances than their Canon EF relatives.  You need to set it back 42mm instead of 44mm.  Remember to also account for the EF to FD adapter.

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