New Canon70-200 2.8L IS II. It was varifocal, now parfocal.

Started by vstrglv, October 18, 2013, 06:50:20 PM

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vstrglv

I've bought new Canon 70-200,2.8 L IS II USM and notice that focus point goes back if I change focus length from 200mm to 70mm.  I decided to increase a bit a distance from camera to the lens.
  Start on the back. Unscrew four bigger screws. Insert  thin metal sheets between bayonet joint and lens body near each screw. In my case it was thin metal sheet from beer can. It thickness was 130mkm.Then screw these screws. Now my Canon 70-200,2.8 L IS II USM is perfectly parfocal.
Canon 5D3,1.1.3; Canon EOS M,202,  CF-SanDisk Extreme PRO,160MB/s, 256GB, SD-SanDisk Extreme Pro, 170MB/s, 128GB.

atarijedi

You need to make 2 videos, one showing what you did, and another showing example footage!

Africashot

ML 5D2 & T3i

vstrglv

Canon 5D3,1.1.3; Canon EOS M,202,  CF-SanDisk Extreme PRO,160MB/s, 256GB, SD-SanDisk Extreme Pro, 170MB/s, 128GB.

jose_ugs

Quote from: vstrglv on October 18, 2013, 06:50:20 PM
Start on the back. Unscrew four bigger screws. Insert  thin metal sheets between bayonet joint and lens body near each screw.

These 4?


vstrglv

Canon 5D3,1.1.3; Canon EOS M,202,  CF-SanDisk Extreme PRO,160MB/s, 256GB, SD-SanDisk Extreme Pro, 170MB/s, 128GB.


vstrglv

I guess that it is possible to adjust this lens for parfocal only if you need to increase distance from camera to lens. May be it depends on a lens copy.
Canon 5D3,1.1.3; Canon EOS M,202,  CF-SanDisk Extreme PRO,160MB/s, 256GB, SD-SanDisk Extreme Pro, 170MB/s, 128GB.

jose_ugs

I think it's not a matter of lens copy.

@5D3shooter, you'll fall in love soon :)

5D3shooter

Quote from: jose_ugs on October 22, 2013, 12:21:53 AM
I think it's not a matter of lens copy.

@5D3shooter, you'll fall in love soon :)

I CANT WAIT!!  B&H is shipping it out today, so hopefully I'll have it by the weekend.  I also got a HOYA HD protection filter and a BlackRapid Sport 2 strap.  Going to be a great unboxing!

atarijedi

130mkm is 130 microns(mikrons)?

Which I believe would be 0.13mm.

vstrglv

Canon 5D3,1.1.3; Canon EOS M,202,  CF-SanDisk Extreme PRO,160MB/s, 256GB, SD-SanDisk Extreme Pro, 170MB/s, 128GB.