35mm adapter with CANON FD + NIKON mounts (+ infinite focus ;) )

[musicjules]

hey hv20.com !

i talked about this before : when i decided to have a mini35 adapter i chose nikon lenses. a 50mm 1,4 and a 28mm 2,8 to be precise.
i also have a really nice TOKINA ATX 35-200mm f/3,5-4,5 but it's a canon FD mount.... my brain start to work (for the first time ever) and i had this idea :
the focal flange of the canon fd is shorter than the nikon, so i just have to build an adapter to reduce the focal flange ... yeah that's stupid but i was persuaded that playing with the rings will allow me to reach a solution.
and this is what i've done :

1. put away my nikon 50mm + the nikon to canon eos adapter
2. put away the bayonet ring
3. put the canon fd mount with the adapter i've made.
4/5. the adapter is made of a rear canon FD lens cap(i made the hole) and a macro extension tube number 1 ( i had one left) and sort of glue the two (the screws are a temporary solution)
6. i screw the adapter on the canon FD lens.
7. this how it looks. this is really rigid.



with this solution i can reach infinite focus and more because the lens (tokina ATX 35-200mm F/3,5-4,5) has a macro ring.
i know that those who have sealed their adapter with a uv filter on the bayonet ring, for those using the VH-57X and for many others this solution doesn't work .... but it could help !
cheers

[Ian-T]

Video samples please...????

[musicjules]

i will post something

[exte]

I'd love to see what you got. Also, do you use the 35mm with a steadicam?

[musicjules]

I'd love to see what you got. Also, do you use the 35mm with a steadicam?

no steadycam !

[PeterC]

So what vibrating GG holder are you using?

Also, it doesn't look like you're able to adjust the focal flange... or can you explain how you're able to achieve infinity focus?

Thanks,
Peter

[musicjules]

So what vibrating GG holder are you using?

Also, it doesn't look like you're able to adjust the focal flange... or can you explain how you're able to achieve infinity focus?

Thanks,
Peter

hi peter,
i'm using the VH57 from daniel's.
in fact i didn't adjust the focal flange , the trick is here : everyone try to move the GG holder , i found this solution dangerous (the more you touch to your focusing screen , the more you have a chance to destroy it)

here are the fact : i'm using nikon and canon FD lenses ,

nikon focal flange : 46,5mm
canon FD : 42mm

so i had to put my canon fd lenses 4,5mm nearer than the nikon lenses, ok ?
to achieve this , i put away of the adapter the bayonet ring+nikon to canon eos adapter (approx : 12mm)
and replace it with a home made adapter (made with a ring from the canon extension tubes i had left : the number 1 : (approx 7,5mm).

let's see focal flange : 46,5-12+7.5 = 42 mm ....

this is how i achieve infinite focus without touching my GG holder. is it clear ?

[billbruford]

dude you rock i just got a canon fd 1.2 50 mm and bought the stupid acnon fd to eos adapter ring but from the sound of what you did i think that i could modify it your way and have the same results. i already have the DOF adapter built from the canon eos mount to the gg holder and i dont feel like changing that and i dont feel like having to make another adapter (mine already vibrates and all that) and just screwing off the bayonetting ring and using some of the leftover tubes sounds like it will work just fine.
bb