Home · Register · Search · View Winners · Software · Hosting · Software · Join Upload & Sell

Moderated by: Fred Miranda
Username   Password

  New fredmiranda.com Mobile Site
  New Feature: SMS Notification alert
  New Feature: Buy & Sell Watchlist
  

FM Forums | Alternative Gear & Lenses | Join Upload & Sell

1
       2       3              12       13       end
  

Archive 2009 · FD 85L f/1.2: a real gem
  
 
AlexTokyo
Offline
• •
Upload & Sell: Off
p.1 #1 · p.1 #1 · FD 85L f/1.2: a real gem


Just finished converting the FD 85L f/1.2L. Lots of work but worth it for a <$300 lens.

It is lighter than EF 85L, has fantastic manual focus, real easy to use w/ Live View (5D MkII) and surprisingly sharp at f/1.2.

See for yourself (f/1.2):






100% crop (21MP):






Apologies for the uninspiring pic, just had to try it on the first thing around. Doesn't do justice to the lens, hopefully Sakura/Hanami will fix that in Tokyo.



Apr 03, 2009 at 12:28 PM
AlexTokyo
Offline
• •
Upload & Sell: Off
p.1 #2 · p.1 #2 · FD 85L f/1.2: a real gem


It is a portrait lens, so here is one. Again ... I just had to try it.

f/1.2:






Edited on Sep 14, 2009 at 08:26 PM · View previous versions



Apr 03, 2009 at 12:30 PM
Shuko
Offline
• •
Upload & Sell: Off
p.1 #3 · p.1 #3 · FD 85L f/1.2: a real gem


Convert one more and I'll buy it.


Apr 03, 2009 at 12:54 PM
AlexTokyo
Offline
• •
Upload & Sell: Off
p.1 #4 · p.1 #4 · FD 85L f/1.2: a real gem


Shuko wrote:
Convert one more and I'll buy it.


Not everybody is OK with a lens not focusing to infinity ... Mine focuses up to ~10m or so because I choose to keep the same lens configuration as in the FD setup. It might be possible to adjust for infinity focus (i.e. Rokkor method), I just don't know how yet.

Best is to do it yourself (not really difficult and very self rewarding); if I have time I will post a how-to.



Apr 03, 2009 at 01:02 PM
norrad
Offline
• •
Upload & Sell: Off
p.1 #5 · p.1 #5 · FD 85L f/1.2: a real gem


congratulations on your project!

I would love to see a how-to post also.



Apr 03, 2009 at 01:15 PM
hdan
Offline
• •
Upload & Sell: Off
p.1 #6 · p.1 #6 · FD 85L f/1.2: a real gem


Great work. I would also love to see a how-to.


Apr 03, 2009 at 01:46 PM
TheObiJuan
Offline
• • •
Upload & Sell: On
p.1 #7 · p.1 #7 · FD 85L f/1.2: a real gem


Oooh, nice!
I'd like one, but the cost to convert dissuades me.



Apr 03, 2009 at 01:48 PM
Empire
Offline
• • •
Upload & Sell: Off
p.1 #8 · p.1 #8 · FD 85L f/1.2: a real gem


norrad wrote:
congratulations on your project!

I would love to see a how-to post also.


+11111111



Apr 03, 2009 at 01:58 PM
SJMD
Offline
• • • • • •
Upload & Sell: Off
p.1 #9 · p.1 #9 · FD 85L f/1.2: a real gem


congrats


Apr 03, 2009 at 08:20 PM
JohnJ
Offline
• • •
Upload & Sell: Off
p.1 #10 · p.1 #10 · FD 85L f/1.2: a real gem


I'd love to see a proper comparison between this lens (FD 85 1.2 SSC or 'L') and either the EF 85 1.2L or maybe EF 85 1.2L II.

I had the FD 85 1.2 SSC and EF 85 1.2L and found no real optical difference between them but I never did compare them directly in a methodical way and I suspect this is the only way to show up minor differences.

I suppose I'm questioning if there is really any point in doing the conversion other than possibly saving some money. I don't mean to be critical, just qurious.

JJ



Apr 03, 2009 at 10:36 PM
 

Search in Used Dept. 



AlexTokyo
Offline
• •
Upload & Sell: Off
p.1 #11 · p.1 #11 · FD 85L f/1.2: a real gem


JohnJ wrote:
I suppose I'm questioning if there is really any point in doing the conversion other than possibly saving some money. I don't mean to be critical, just qurious.
JJ


Since it is a time consuming conversion, this is a very valid question. My motivation was:


    Weight: EF = 1,025g (2.3lb) ; FD = 680g (1.5lb)
    Compactness: EF = 84mm ; FD = 71mm
    Manual Focus of FD is great
    Cost: EF ~$1,000 / $1,500 ; FD = $300 for an E+ copy


The other reason was that it is a fun project.



Apr 03, 2009 at 11:12 PM
hdan
Offline
• •
Upload & Sell: Off
p.1 #12 · p.1 #12 · FD 85L f/1.2: a real gem


Alex,

You've mentioned that the conversion isn't difficult but still a lot of work and a time consuming process. What part of the process has been the most difficult? The most time consuming?

I wasn't as lucky as you, so I purchased my 85/1.2 SSC a bit on the high side. As a result, I want to make certain that I understand the conversion process thoroughly lest my ineptitude destroy the lens.



Apr 04, 2009 at 02:30 AM
ewadler
Offline
• •
Upload & Sell: On
p.1 #13 · p.1 #13 · FD 85L f/1.2: a real gem


I haven't seen any fd 85/1.2's go for $300. Not saying there haven't been any, but it seems as though the going price is a little higher. If I am wrong please point me in the direction of some $300 FD 85L's, I want one.


Apr 04, 2009 at 03:15 AM
hdan
Offline
• •
Upload & Sell: Off
p.1 #14 · p.1 #14 · FD 85L f/1.2: a real gem


I've seen them go for $450-$500, but not in E+ condition.


Apr 04, 2009 at 03:22 AM
dancam
Offline
• • •
Upload & Sell: On
p.1 #15 · p.1 #15 · FD 85L f/1.2: a real gem


Alt lens conversion is an idea I keep toying around with. I do currently have one FD lens and have considered and passed on others. This and the rokkors show the potential, I guess I'm still worried about the problems with clearances and focusing. What conversion kit did you use for your 85L? Any mirror problems?


Apr 04, 2009 at 03:27 AM
AlexTokyo
Offline
• •
Upload & Sell: Off
p.1 #16 · p.1 #16 · FD 85L f/1.2: a real gem


hdan wrote:
You've mentioned that the conversion isn't difficult but still a lot of work and a time consuming process. What part of the process has been the most difficult? The most time consuming?


Most difficult: none really. I was just careful not to damage the rear element when resizing it and removing all the mechanical guts. Plastic/tape protection helped.

Most time consuming: figuring out how the aperture works, and measuring everything to keep the original FD configuration. Then, resizing rings/spacers with a file. I wanted to go slow to avoid big mistakes.

Here are some critical measurements (85L, not SSC) I made:






Hope that helps,
Alex



Apr 04, 2009 at 03:33 AM
AlexTokyo
Offline
• •
Upload & Sell: Off
p.1 #17 · p.1 #17 · FD 85L f/1.2: a real gem


ewadler wrote:
I haven't seen any fd 85/1.2's go for $300. Not saying there haven't been any, but it seems as though the going price is a little higher. If I am wrong please point me in the direction of some $300 FD 85L's, I want one.


E-bay isn't always the best place to shop. I am lucky enough to live in Tokyo, so I go to fly market and used gear photo shops. $300 ~ $350 is quite common for a 85L.



Apr 04, 2009 at 03:35 AM
AlexTokyo
Offline
• •
Upload & Sell: Off
p.1 #18 · p.1 #18 · FD 85L f/1.2: a real gem


dancam wrote:
Alt lens conversion is an idea I keep toying around with. I do currently have one FD lens and have considered and passed on others. This and the rokkors show the potential, I guess I'm still worried about the problems with clearances and focusing. What conversion kit did you use for your 85L? Any mirror problems?


This not a kit, this is pure DIY.

If you want infinity focus and original FD configuration, the rear element needs to be at 1.7mm above EF mount. Typically up to 1.2 ~ 1.5mm is OK before getting in Mirror issues. Mine is set at 0.7mm to avoid any problem. Next step is either to understand if we can adjust the lens infinity (a la Rokkor) or remove another 0.5mm to gain focus up to 15m.



Apr 04, 2009 at 03:48 AM
JimBuchanan
Offline
• • •
Upload & Sell: On
p.1 #19 · p.1 #19 · FD 85L f/1.2: a real gem


AlexTokyo wrote:
This not a kit, this is pure DIY.

If you want infinity focus and original FD configuration, the rear element needs to be at 1.7mm above EF mount.


That sounds about right. My EOS/FD50L rear element is at about 2mm above the EF mount, and is pretty much exactly placed in relation to the main lens assembly at infinity.







Apr 04, 2009 at 03:59 PM
AlexTokyo
Offline
• •
Upload & Sell: Off
p.1 #20 · p.1 #20 · FD 85L f/1.2: a real gem


JimBuchanan wrote:
That sounds about right. My EOS/FD50L rear element is at about 2mm above the EF mount, and is pretty much exactly placed in relation to the main lens assembly at infinity.


Here is where the 1.7mm comes from, given an EF mount total length at 6.67 mm, from mouth to ring base.

We want FD config, so according to the above diagram we want the rear element at 10.40mm "altitude" vs screw base. This gives:
- Screw base 0.00 mm
- Original spacer ring (after removing the little gouge) 2.00 mm
- EF mount total 6.67 mm
- Distance EF-RE X mm
- Rear Element 10.40 mm

=> Distance EF mouth / Rear Element X = 1.73mm




Apr 05, 2009 at 01:57 AM
1
       2       3              12       13       end




FM Forums | Alternative Gear & Lenses | Join Upload & Sell

1
       2       3              12       13       end
    
 

You are not logged in. Login or Register

Username   Password    Reset password