Home made hobo 10x8 camera + componon

[Toffle]

thanks for your help

i will test the lens spacing i think then i will rest :0)

You could also test it as a convertable... try a shot with just the front or the rear elements. Your focal length and aperture will need to be recalculated, but it might help isolate the problem.

[paulie]

yeah ive used the lenses rear element reversed before and it worked well,around 350mm at f13, no hot spot, sharp in the center soft around the edges on a 4x5 view camera

unfortunately the extra focal length would warrant a complete new design and construction of my hobo

little disappointing, but i will live

[Toffle]

yeah ive used the lenses rear element reversed before and it worked well,around 350mm at f13, no hot spot, sharp in the center soft around the edges on a 4x5 view camera

unfortunately the extra focal length would warrant a complete new design and construction of my hobo

little disappointing, but i will live

The other option is to put it in a box and send it to me... That's the kind of stuff I love to mess with.

[paulie]

haha i think ill keep it for the rear cell reversed, thats a good combo anyways, i am going to test it one more time , if its no good i will revert to my 250mm pinhole

[paulie]

i today tested the lens reversed on a calumet and this has corrected the hotspot,great but how do i trigger the shutter, well...

my hobo camera is foam core so i just made a hole and pushed a shutter relaese through and glued it firmly with epoxy resin and graphite/Indian ink to light proof it

this now allows me to preset the shutter and aperture (thats no problem), i lock the shutter release to prevent accidental firing.

here is a shot i took tonight

1.5 hours f22 view from my balcony ,jordaan amsterdam

thanx for your help

i also have picked a couple repromaster lenses to play with

lucky me :0)

[paulie]