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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 17 Sep 2012 (Monday) 13:11
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New Sigma 35mm f/1.4 HSM DG

 
Vixen89
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Jul 25, 2013 15:14 |  #3256

xpfloyd wrote in post #16153489 (external link)
OK I seem to have made a breakthrough. Lens seems to finally be functioning correctly at all focus distances wide open.

I downloaded and installed magic lantern onto my CF card and installed it on my camera. I then downloaded and installed the latest magic lantern nightly build (as dottune is not in the normal version of magic lantern yet). I then ran dottune via magic lantern for the 4 distances required for the dock. The process is fully automated and seems very accurate.

I ended up with +1, +6, +8, -2

I put these numbers into the dock software, updated the lens and set my body MA back to 0. I then set up the camera at a random distance from the target and ran the automated dottune again as a check and it came out as 0. RESULT!

I have been taking test shots for about an hour of real subjects hand held and it seems to be spot on. I'm now a happy camper!

If sigma release an ART version of the 85 1.4 that can be dock calibrated I will now be buying it. I had the existing version but sold it due to AF issues

THIS is great news!!


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Giorgos
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Jul 25, 2013 15:38 |  #3257

i am very happy with this... lets hope the dock will work ok for me too :) congrats my friend!
ps:dont get cut from the sharpness!


5D MKIII / 550D / Σ 35 / Σ 17-50 / 24-105 f/4L is usm / 70-200 f/2.8L is usm ii
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Jasonfire124
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Jul 25, 2013 15:43 |  #3258

Vixen89 wrote in post #16153438 (external link)
Go to your Flickr, click on the image you want to share with us and you should see a little toolbar at the bottom of your image. It should be a star, chat bubble and then a "more ways to share" arrow icon. Click on that arrow icon and click "GRAB THE HTML/BBCode" and copy that IMG code and paste it here..should look like this when you're done.

QUOTED IMAGE
IMAGE LINK: http://www.flickr.com …/24290513@N06/9​360398731/  (external link)
minion (external link) by Vixxie PWI (external link), on Flickr

IMAGE: http://farm8.staticflickr.com/7328/9357008907_60edfac45c.jpg
IMAGE LINK: http://www.flickr.com/​photos/jayfire124/9357​008907/  (external link)
Untitled (external link) by jayfire124 (external link), on Flickr

Thanks Vixen89 you made that so simple. When this lens nails it...it nails it...

Canon 1D MKIII(SOLD), 5Dc(SOLD), Fuji X-T1, Fuji X100, 5D MKIII, 70-200 f2.8L, 85 1.8, 50 1.8II, 17-40 f4L, Sigma 35 1.4, Fuji 18-55 Kit Lens, Fuji 35mm f1.4, Fuji 55-230, Samyang 12mm f2
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Jasonfire124
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Jul 25, 2013 15:48 as a reply to  @ Jasonfire124's post |  #3259

IMAGE: http://farm4.staticflickr.com/3728/9356216725_46b5b15fbf.jpg
IMAGE LINK: http://www.flickr.com/​photos/jayfire124/9356​216725/  (external link)
8B7B1825 (external link) by jayfire124 (external link), on Flickr

However, when it doesn't nail it it may front focus slightly (see sharpness on sleeve)

Canon 1D MKIII(SOLD), 5Dc(SOLD), Fuji X-T1, Fuji X100, 5D MKIII, 70-200 f2.8L, 85 1.8, 50 1.8II, 17-40 f4L, Sigma 35 1.4, Fuji 18-55 Kit Lens, Fuji 35mm f1.4, Fuji 55-230, Samyang 12mm f2
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xpfloyd
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Jul 25, 2013 15:50 |  #3260

Jason, how are you working out your 4 MA values for the dock?


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Vixen89
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Jul 25, 2013 16:04 |  #3261

Jasonfire124 wrote in post #16153655 (external link)
QUOTED IMAGE
IMAGE LINK: http://www.flickr.com/​photos/jayfire124/9356​216725/  (external link)
8B7B1825 (external link) by jayfire124 (external link), on Flickr

However, when it doesn't nail it it may front focus slightly (see sharpness on sleeve)

oh I see it, and yeah definitely probably needs some MA, good thing yer using the 5D3. :D

EDIT: I take that back, I think the dock would work better here cause you can adjust the 1st value and leave the rest alone if the lens is functioning correctly throughout to infinity~


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Jasonfire124
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Jul 25, 2013 16:12 |  #3262

xpfloyd wrote in post #16153659 (external link)
Jason, how are you working out your 4 MA values for the dock?

I don't have the dock. MA to +10 only in 5D MKIII. Hit and miss but haven't tested it indoors yet. I don't think that I have the tech ability or time to spend on 'getting it right' as you have xpfloyd. I take my hat off to you for your persistence. This 'magic lantern' etc is all lost on me I must admit.

Still may buy the dock although would be gutted if it still didn't nail focus everytime after using it.


Canon 1D MKIII(SOLD), 5Dc(SOLD), Fuji X-T1, Fuji X100, 5D MKIII, 70-200 f2.8L, 85 1.8, 50 1.8II, 17-40 f4L, Sigma 35 1.4, Fuji 18-55 Kit Lens, Fuji 35mm f1.4, Fuji 55-230, Samyang 12mm f2
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Vixen89
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Jul 25, 2013 16:13 |  #3263

Jasonfire124 wrote in post #16153711 (external link)
I don't have the dock. MA to +10 only in 5D MKIII. Hit and miss but haven't tested it indoors yet. I don't think that I have the tech ability or time to spend on 'getting it right' as you have xpfloyd. I take my hat off to you for your persistence. This 'magic lantern' etc is all lost on me I must admit.

Still may buy the dock although would be gutted if it still didn't nail focus everytime after using it.

Maybe there's a local camera store with the dock that can calibrate it for you or a friend? I bet it'll fix all this. :(


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xpfloyd
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Jul 25, 2013 23:23 |  #3264

Jasonfire124 wrote in post #16153711 (external link)
I don't have the dock. MA to +10 only in 5D MKIII. Hit and miss but haven't tested it indoors yet. I don't think that I have the tech ability or time to spend on 'getting it right' as you have xpfloyd. I take my hat off to you for your persistence. This 'magic lantern' etc is all lost on me I must admit.

Still may buy the dock although would be gutted if it still didn't nail focus everytime after using it.

Your issues sound like mine. I really think you would benefit from the dock. Magic lantern was new to me but was really easy and in the end the dottune process took 10 minutes. I will write a detailed how to later


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Jasonfire124
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Jul 26, 2013 02:27 |  #3265

xpfloyd wrote in post #16154630 (external link)
Your issues sound like mine. I really think you would benefit from the dock. Magic lantern was new to me but was really easy and in the end the dottune process took 10 minutes. I will write a detailed how to later

Thanks xpfloyd, appreciate your help, will order dock from Amazon.


Canon 1D MKIII(SOLD), 5Dc(SOLD), Fuji X-T1, Fuji X100, 5D MKIII, 70-200 f2.8L, 85 1.8, 50 1.8II, 17-40 f4L, Sigma 35 1.4, Fuji 18-55 Kit Lens, Fuji 35mm f1.4, Fuji 55-230, Samyang 12mm f2
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xpfloyd
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Jul 26, 2013 05:34 |  #3266

Ive had a couple of PM's about this too so heres a quick "how-to" for installing magic lantern + nightly build + carrying out the automated dottune to get the 4 values required from the dock (Its how I done it anyway and it seems to have worked)

1 - Get a good target - I downloaded this one here - http://chriscontiphoto​graphy.com/stuff/lens_​test_chart.jpg (external link) . I then printed it A3 and laminated it in work (laminating not required)

2 - Ensure your camera has the latest Canon firmware installed - These can be found on the canon website with instructions of how to update (very easy)

3 - Download magic lantern 2.3 from here - http://www.magiclanter​n.fm/download (external link)

4 - Install magic lantern onto your camera by following the installation instructions that are contained within the zip file.

Basically though you format your CF card in camera. Remove it and connect it to your PC. Copy the entire contents of the zip file onto the card. Put the card back in the camera. Power up the camera and run the firmware update process and follow the on screen instructions. Re-boot the camera and check that magic lantern installed correctly (user manual also contained in the zip)

5 - Download the latest magic lantern nightly build from here - http://nanomad.magicla​ntern.fm/nightly/ (external link)

6 - To install the nightly build, remove the CF card from the camera and connect to PC. Copy the autoexec.bin file from the nightly build zip file on to the card (overwrite the one thats there). Put CF card back in camera and switch on. Dottune will now be an option in the magic lantern menus.

7 - Set up camera on tripod 0.3m away from wall (there is a mark on the body showing where to measure from). Make sure there is good light (outside is better). Make sure camera is level (I use a cheap hotshoe bubble). Make sure camera is square to the wall (I measure the distance from the wall to each side of the lens).

8 - Stick target onto wall making sure that centre of target is centred on your centre focus point.

9 - Switch to live view 10x and focus the target either manually or automatically. When in perfect focus switch the lens to manual focus taking care not to turn the focus ring.

10 - Go into the magic lantern menu and select dottune and click OK. Dottune will now be carried out without you having to do anything. At the end it will tell you the MA value. Write this down.

11 - Reset everything at the next distance from the wall. Reset the MA value in camera back to 0 and repeat the dottune process. Do this for each of the 4 distances (For infinity I focussed on a building away in the distance that had good contrasting lines)

12 - Now that you have your 4 dottune values load the lens up in the dock and enter them in.

13 - Set the MA in camera to 0. Your lens should now focus correctly. As a check I set up on a tripod again at a random distance and carried out dottune again and it came out 0 (which it should).

You can then uninstall magic lantern if you wish. Instructions of how to uninstall are in the magic lantern guidance documents contained in the zip file. If you want to revert back to magic lantern 2.3 (the current stable version without dottune) just copy the original autoexec.bin file onto the CF card again. If not you can revert back to the standard canon firmware.

I am personally going to keep magic lantern for a couple of the features - fast zoom (when you click play button to review a photo and then click zoom in button it instantly zooms to full zoom. You then click once more and it zooms back out. Great for checking focus of shots quickly). Auto HDR bracketing (take your initial shot and magic lantern automatically takes as many other shots as required to cover the full dynamic range). Intervalometer (Going to give this a try for star trails).

Disclaimer - Magic lantern clearly states in their own disclaimer that it can damage your camera functionality if you do not install/uninstall it correctly. Be sure to read the instrucitons carefully and make your own decision. I dont want to be held responsible for you breaking your camera following these instructions. That said it has worked a charm on my camera.

I had never used magic lantern before yesterday. It took about 5 minutes to install then the whole dottune process took 10 mins.


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Chiggs
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Jul 26, 2013 06:08 |  #3267

I just got my copy, really nice lens! Are you guys getting major vignetting wide open? I find that it goes away at f4 (approximately). Normally, I'm a pretty big fan of post processing vignetting, but I think it might be A little too much for my taste. Will the dock fix this?


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Jul 26, 2013 06:15 |  #3268

Chiggs wrote in post #16155033 (external link)
I just got my copy, really nice lens! Are you guys getting major vignetting wide open? I find that it goes away at f4 (approximately). Normally, I'm a pretty big fan of post processing vignetting, but I think it might be A little too much for my taste. Will the dock fix this?

These shots below were all taken wide open (before I got the dock) - Are you getting more vignetting than this?

IMAGE: http://farm4.staticflickr.com/3702/9336995444_20b7991101_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/xpfloyd/9336995​444/  (external link)
Taylor (external link) by xpfloyd (external link), on Flickr

IMAGE: http://farm3.staticflickr.com/2820/9335924419_94530c324c_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/xpfloyd/9335924​419/  (external link)
Callum - 21.07.13 (external link) by xpfloyd (external link), on Flickr

IMAGE: http://farm4.staticflickr.com/3819/9353781774_3f2e414b86_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/xpfloyd/9353781​774/  (external link)
Diego (external link) by xpfloyd (external link), on Flickr

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Jasonfire124
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Jul 26, 2013 07:27 |  #3269

Chiggs wrote in post #16155033 (external link)
I just got my copy, really nice lens! Are you guys getting major vignetting wide open? I find that it goes away at f4 (approximately). Normally, I'm a pretty big fan of post processing vignetting, but I think it might be A little too much for my taste. Will the dock fix this?

Mine doesn't suffer from vignetting, post an image to show what you mean, it may help with the perception of what may be acceptable and normal or what may be over the top.


Canon 1D MKIII(SOLD), 5Dc(SOLD), Fuji X-T1, Fuji X100, 5D MKIII, 70-200 f2.8L, 85 1.8, 50 1.8II, 17-40 f4L, Sigma 35 1.4, Fuji 18-55 Kit Lens, Fuji 35mm f1.4, Fuji 55-230, Samyang 12mm f2
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Chiggs
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Jul 26, 2013 07:30 |  #3270

xpfloyd wrote in post #16155044 (external link)
These shots below were all taken wide open (before I got the dock) - Are you getting more vignetting than this?

Yeah a little more even. I'll post some shots soon.
Also, does the dock cure this?


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