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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras
Thread started 12 Aug 2009 (Wednesday) 18:00
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Lens Align Pro - Just Arrived -- WOW!

 
hawk911
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Aug 13, 2009 08:24 |  #16

hmmm- reason to upgrade to the 5Dm2, right? :)


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jwkramer
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Aug 13, 2009 09:01 |  #17

hawk911 wrote in post #8451865external link
hmmm- reason to upgrade to the 5Dm2, right? :)

I'll bet Canon puts this on all of the Prosumer, and Pro models from here on out.

Note to Canon - Hurry up with the 1D Mk IV!!!! :)


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jacobsen1
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Aug 13, 2009 09:03 |  #18

jacobsen1 wrote in post #8451698external link
seriously though, had you guys used something before this? What were your adjustments for your old method -vs- lens align pro?

anyone?


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jwkramer
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Aug 13, 2009 09:06 |  #19

jacobsen1 wrote in post #8452051external link
anyone?

I didn't try in manually... I only used the Lens Align.


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paparios
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Aug 13, 2009 09:40 |  #20

Saint728 wrote in post #8449042 (external link)
I was looking at that as well, but I don't really want to spend almost $200.00 with shipping. Looks good and it helped a lot. I'm not sure if my lenses are that much off to justify the price for these.

Take Care,
Cheers, Patrick

I have tried all of the different methods to do the micro adjustment of my lenses on my 50d.

Finally, I have come to the following method, which is quite easy and affordable to do.
I use a ruler and a video box on a table. The ruler is inclined to 45 degrees (front to back) and its purpose is to check the depth of field of the lens and so, determine if the lens is front or back focussing. An additional advantage of using this ruler is that you need, theoretically, only one shot to do the test.
The video box (or any object with a flat surface) is placed perpendicular to the lens axis, and its purpose is to serve as a good target for the camera focussing system.
So you auto focus on the video box and then check the depth of field result on the ruler.

The example and 100% crop illustrate the method. Focus was the letter H on VHS of the video box. The ruler indicates that the lens ( EF70-200 f4L IS at 200mm) is dead on the target, with the depth of field being symmetrical with respect to the black vertical line of the ruler.

Miguel

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CROW21
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Aug 13, 2009 09:46 |  #21

[QUOTE=jacobsen1;84516​98]even then it wouldn't be free! But maybe he's not in England, so it's zero pounds but ~10 EUR or USD? :lol:

lol :-)


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jwkramer
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Aug 13, 2009 09:56 |  #22

paparios wrote in post #8452238external link
The video box (or any object with a flat surface) is placed perpendicular to the lens axis

and THIS is exactly why you need Lens Align - there is simply ***NO WAY*** you are going to get that video box ***EXACTLY*** perpendicular to your camera/lens at the distances required (say 8' or so for a 100mm lens).

That is EXACTLY what the Lens Align system does - ensures that the camera and the target are PERFECTLY ALIGNED.

:cool:


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pikeface999
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Aug 13, 2009 10:04 |  #23

[QUOTE=jacobsen1;84516​98]even then it wouldn't be free! But maybe he's not in England, so it's zero pounds but ~10 EUR or USD? :lol:


Actualy it was £2.5 (english) for the MDF and the targets were drawn up using viso and printed on photo paper.

And no I don,t own a hardware store but do have some DIY bits.


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jwkramer
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Aug 13, 2009 10:11 |  #24

[QUOTE=pikeface999;845​2381]

jacobsen1 wrote in post #8451698external link
even then it wouldn't be free! But maybe he's not in England, so it's zero pounds but ~10 EUR or USD? :lol:

Actualy it was £2.5 (english) for the MDF and the targets were drawn up using viso and printed on photo paper.

And no I don,t own a hardware store but do have some DIY bits.

I was just giving you a rough time! It's all in good fun.

The rig you built looks quite a bit like the Lens Align rig. My only concern would be ensuring that the front and back planes were precisely aligned. Did you use some kind of micrometer for that? Just curious...


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Pekka
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Aug 13, 2009 10:14 |  #25

jwkramer wrote in post #8452342external link
and THIS is exactly why you need Lens Align - there is simply ***NO WAY*** you are going to get that video box ***EXACTLY*** perpendicular to your camera/lens at the distances required (say 8' or so for a 100mm lens).

That is EXACTLY what the Lens Align system does - ensures that the camera and the target are PERFECTLY ALIGNED.

:cool:

In my experience the alignment should be done to distance you shoot. LensAlign seems more like a closeup test tool. And also, in real life shooting there are so many variables in focusing, apart from your own involuntary swaying, what matters most is your focusing method (where you focus in subject) in any given frame. If lens misses fraction of mm in 2 meters test: it really does not matter at all. Honestly. Home made test like paparios did are perfectly adequate for testing if lens is in ballpark, even if their tests are not capable of 1/100mm resolution or similar.


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paparios
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Aug 13, 2009 10:18 |  #26

jwkramer wrote in post #8452342external link
and THIS is exactly why you need Lens Align - there is simply ***NO WAY*** you are going to get that video box ***EXACTLY*** perpendicular to your camera/lens at the distances required (say 8' or so for a 100mm lens).

That is EXACTLY what the Lens Align system does - ensures that the camera and the target are PERFECTLY ALIGNED.

:cool:

I can assure you that the alignment process is quite easy and fast, and I don't need to use even a measuring tape or level to get things right.
But, of course, if you trust more your $200 device, it is your right choice. The final fact is that you and me will be happy with the results you get with your lenses and I get with my system.

Miguel


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tvphotog
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Aug 13, 2009 10:25 |  #27

I guess I have to admit to OCD, as I spent the money despite the fact that I'll only use it a couple of times. But it's a fantastic system, and it'll be useful to see if focus is off if the lens gets bumped around during travel, etc.

Also, on my zoom lens, I checked the microadjustment at both extremes, which will enable me to dial in better sharpness if I have time before taking a shot using one extreme or the other. Middle of the range = split the difference.


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jwkramer
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Aug 13, 2009 10:28 |  #28

Pekka wrote in post #8452451external link
In my experience the alignment should be done to distance you shoot. LensAlign seems more like a closeup test tool. And also, in real life shooting there are so many variables in focusing, apart from your own involuntary swaying, what matters most is your focusing method (where you focus in subject) in any given frame. If lens misses fraction of mm in 2 meters test: it really does not matter at all. Honestly. Home made test like paparios did are perfectly adequate for testing if lens is in ballpark, even if their tests are not capable of 1/100mm resolution or similar.

actually, the Lens Align system has the camera and target separated by a distance on 25x the focal length of the lens. Canon specs this distance as 50x the focal length. When I set up my calibration last night, I used 15' for a 100mm macro lens (f/stop wide open). You can see by my sample pics that the DOF is not really narrow enough. When I test next time, I will use 8' as the distance. The difference in DOF for a 100mm @ f/2.8 at 8' and 15' is fairly large. At 8', the DOF is 3.5", at 16' it jumps to 12.6" - which is why my entire ruler appears in focus in the final shot.


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jacobsen1
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Aug 13, 2009 10:51 as a reply to jwkramer's post |  #29

basically, the lens align pro is a very nice and very precise tool, but it's also expensive. Using other things we all have on hand (images on screen, rulers, MFD and slick printouts etc) all work pretty damned well if we're cheap bastards. But at the end of the day, what really matters is actually getting out there and adjusting your lenses if you think they're off. It's not that hard. Plus, once I'd run through the steps once, I was able to adjust a new lens I couldn't test at home in the field just focusing on a random object (a nail in the bench I was sitting on) because I'd gone through the steps.

LAP circumcises the flee that is microadjusting exactly. Using a random object in the field works much better than NOT adjusting it at all... So really, just use what you have, but DO NOT be affriad of messing up a lens... It's VERY easy to turn off the adjustments all together or dial them back to '0'...


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CyberDyneSystems
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Aug 13, 2009 11:40 |  #30

All the lens align seems to be doing is packaging the system we have had in our FAQ on testing for front/back focus since 2003.

Not that it's a bad thing to do that, but I'm just saying it is not breaking any new ground, nor is it doing anything that we haven't been doing with very affordable alternatives for the last 6 years.

It looks like a great solution.. but Id still offer as an alternative investing a little time in some of the more affordable solutions to any one on a budget.


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