Pinhole "Lens"

Posted by barnoid Fri, 03 Apr 2009 23:19:26 GMT

Pinhole
Thought I should explain the pinhole pictures I’ve been uploading. A body cap with a hole drilled through it, a piece of foil taped over the hole and a tiny hole in the foil made with a pin. The small hole means not much light gets through so long exposures are required. In theory the depth of field should be huge but in practice nothing is in focus. More experimentation is needed.
MakeCanon
ModelCanon EOS 40D
Exposure0.5
Aperturef/8.0
Exposure ProgramAperture-priority AE
ISO Speed320
Date and Time (Original)2009:04:03 22:28:34
Exposure Bias0 EV
FlashOff
Focal Length56 mm
QualityRAW
Metering ModeCenter-weighted average
Lens TypeCanon EF-S 17-85mm f4-5.6 IS USM

Cheepo Action Sampler reassembled

Posted by barnoid Sat, 24 Jan 2009 19:01:12 GMT

Cheepo Action Sampler reassembled
Really should have taken this photo before removing all those tiny screws and springs.
MakeCanon
ModelCanon EOS 40D
Exposure0.003 sec (1/400)
Aperturef/5.6
Exposure ProgramAperture-priority AE
ISO Speed400
Date and Time (Original)2009:01:24 11:08:10
Exposure Bias0 EV
FlashOff
Focal Length85 mm
QualityFine
Metering ModeCenter-weighted average
Lens TypeCanon EF-S 17-85mm f4-5.6 IS USM

How the cheepo Action Sampler works

Posted by barnoid Sat, 24 Jan 2009 19:02:51 GMT

How the cheepo Action Sampler works
Tension in that big spring makes the disk spin so that the hole passes by each lens opening. Winding on the film winds the spring. It seems to need a bit of tension stored in it even between windings and that had somehow got lost. After disassembling the thing I now know how to rewind it with out taking it apart completely. I put most of a film through it broken. The results should be interesting.
MakeCanon
ModelCanon EOS 40D
Exposure0.017 sec (1/60)
Aperturef/5.6
Exposure ProgramProgram AE
ISO Speed400
Date and Time (Original)2009:01:18 14:50:13
Exposure Bias0 EV
FlashOn
Focal Length59 mm
QualityFine
Metering ModeCenter-weighted average
Lens TypeCanon EF-S 17-85mm f4-5.6 IS USM

Primes!

Posted by barnoid Tue, 04 Nov 2008 23:35:12 GMT

Primes!
I got an m42 thread to Canon EF adaptor and have since been collecting nice old primes. This was a 1 second exposure lit with two flashes: the one on the camera and another kind of above and pointing behind the lenses to make sure you can see the lovely rug backdrop through them.
MakeCanon
ModelCanon EOS 40D
Exposure1 sec (1)
Aperturef/14
Exposure ProgramManual
ISO Speed160
Date and Time (Original)2008:11:04 20:15:08
Exposure Bias0 EV
Metering ModeCenter Weighted Average
FlashFlash fired
Focal Length28 mm
Lens TypeEF-S17-85mm f/4-5.6 IS USM

A Cautionary Tale

Posted by barnoid Sat, 16 Jun 2007 22:09:10 GMT

A Cautionary Tale
Don’t drop the lens when reverse lens macroing! I thought my kit lens was a goner when I dropped it about a metre on to concrete. The front focusing element jammed at a nasty angle. Fortunately the optics were unharmed. I managed to take it apart and free the jammed part. It works, it just sounds a bit different when the focusing motor runs. This is a reverse lens macro with my Canon 50mm f1.8 primary. I managed to keep hold of it this time.
MakeCanon
ModelCanon EOS 300D DIGITAL
Exposure0.033 sec (1/30)
Aperturef/0
ISO Speed800
Date and Time (Original)2007:06:15 16:58:31
Exposure Bias-1 EV
Metering ModePattern
Focal Length0 mm

A Cautionary Tale

Posted by barnoid Sat, 16 Jun 2007 22:09:15 GMT

A Cautionary Tale
Repairing my dropped lens.
MakeCanon
ModelCanon EOS 300D DIGITAL
Exposure0.077 sec (1/13)
Aperturef/0
ISO Speed800
Date and Time (Original)2007:06:15 16:57:43
Exposure Bias-1 EV
Metering ModePattern
Focal Length0 mm