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Messages - R1-7D

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106
Lenses / Tokina 16-28mm FX Focusing Issue with 5D3
« on: March 21, 2013, 12:11:17 AM »
I have had this lens for about a month and have been enjoying it. However, tonight I noticed when I went outside to take some shots that it didn't seem to be locking focus on the left hand side. Even if I placed an objected toward the left side of where I was aiming, making sure that the object was closer to the lens than anything on the right side of the view finder, it still seemed reluctant to grab focus toward the left.

I put my 5D3 in a different focusing mode, eight-point selection to the far left, and it managed to lock on okay then. However, once in awhile the camera would seem to do a "freeze lock" and even if I took my finger off the shutter, I could immediately press down again and take a picture without the lens regaining focus.

I tried to replicate this issue on my 5D2, but I can't seem to reproduce it. Everything seems to work normally.

When compared to my 24-105L on my 5D3, aiming directly at the edge of a table, the 24-105 picks up the table in a completely perfect focused line in the view finder. The Tokina 16-28 only picks up the right side of the edge of the table. Again, this doesn't seem to be an issue with the 5D2; the lens worked fine.

I have used FoCal to calibrate the lens on both the 5D2 and 5D3. My adjustments with the 5D3 were -11 for the wide end, and +3 for the telephoto end.



Do you guys think this is a calibration issue, or do you think I should return this copy of the lens and see if I can get another?

107
Software & Accessories / Re: Tripod/Monopod - What a clever idea!
« on: March 14, 2013, 11:48:46 AM »
I don't see why they can't make a tripod where the centre column would just pull out and be extendable for a monopod.

108
EOS Bodies - For Stills / Re: Camera body lens mount removal
« on: February 24, 2013, 08:36:35 AM »
Thanks for the responses.

At least I was smart enough to experiment on something first before messing with my $2000 camera:

I know I said it was my 5D2, but I actually was playing with the mount on my 25mm extension tube to make sure it could be removed easily enough first. The reason is that I have quite a scratched mount on my 5D2 and was thinking I could replace it if it were an easy job.

I simply said 5D2 in the thread to for simplicity for getting my question across.

Now that I know my answer, however, I have another question as a result of my stupid tinkering:

Since I had the four mount screws out on the extension tube, will that too throw the focusing out of whack when used with another lens?




Thanks for the help and everyone's patience. In the future I'll try to make myself leave this stuff alone and control my OCD better.
Extension tubes are very precisely machined as well, the good ones, anyway.  Most tube users are not worried about edge to edge sharpness, and you are magnifying the image anyway to only see the center portion.
 
Unless you see a problem with the image, don't worry.  I would avoid messing with the camera mount though.

So would you say over time all lens mounts need adjusting just from long-term use? I would assume that putting heavier lenses on the camera would also theoretically loosen the lens mount as the metal and plastic fatigues over time.

109
Reviews / Re: 5D3 Nightshot at ISO 102400
« on: February 23, 2013, 01:35:05 PM »
Nice shot! I don't mind grainy nighttime photos. I think it gives them character. The noise pattern on the 5D3 Is exceptional too, with very little bending.

I took a look at your Flickr page. Nice work! I added you as a contact. :-)

110
EOS Bodies - For Stills / Re: Camera body lens mount removal
« on: February 23, 2013, 01:33:14 PM »
So another question: just how strong is the camera body lens mount? Would it not start to come loose overtime just from use? Especially with using giant telephoto lenses?

111
EOS Bodies - For Stills / Re: Camera body lens mount removal
« on: February 22, 2013, 05:42:17 PM »
Don't listen to these guys - take a chainsaw to that puppy and field strip it! 

Seriously though, if yer REALLY worried about the scratched mount, here's food for thought.  Is it just an appearance thing, like surface scratches?  Or is it gouged, as in you had grains of sand on there when you mounted a lens.  I suspect it's just appearance.  You could try polishing, but only if it's something that will keep you awake at night. Practice on the extension tube with a cotton swab (Q-tip) and a small dab of metal polish like Brasso.  Be careful, even if it works, when you do it to the camera you might use too much and it might drip into the camera body.  Plus the whole time you're doing this, dust is falling into the camera body.  My point is, cosmetic mount scratches are nothing to worry about.  Put that OCD on the shelf and take some photos.  And put your extension tube back together, it's fine.

All very good advice, thank you. I appreciate your suggestion about using metal polish, but I think I'll take your latter advice and just take some photos and try to put this behind me; it's safer and more fun anyways!

Again, thank you. :)

112
EOS Bodies - For Stills / Re: Camera body lens mount removal
« on: February 22, 2013, 05:39:08 PM »
Thanks for the responses.

At least I was smart enough to experiment on something first before messing with my $2000 camera:

I know I said it was my 5D2, but I actually was playing with the mount on my 25mm extension tube to make sure it could be removed easily enough first. The reason is that I have quite a scratched mount on my 5D2 and was thinking I could replace it if it were an easy job.

I simply said 5D2 in the thread to for simplicity for getting my question across.

Now that I know my answer, however, I have another question as a result of my stupid tinkering:

Since I had the four mount screws out on the extension tube, will that too throw the focusing out of whack when used with another lens?




Thanks for the help and everyone's patience. In the future I'll try to make myself leave this stuff alone and control my OCD better.
Extension tubes are very precisely machined as well, the good ones, anyway.  Most tube users are not worried about edge to edge sharpness, and you are magnifying the image anyway to only see the center portion.
 
Unless you see a problem with the image, don't worry.  I would avoid messing with the camera mount though.

Thanks again for your response. I always look for your's and Neuro's posts for good information. In this case you saved me from doing something particularly stupid. Much appreciated.

I played with the extension tube a bit with the 100mm L Macro and everything seemed to be fine. Like you said, edge sharpness is not really a priority with extension tubes, anyways.



113
EOS Bodies - For Stills / Re: Camera body lens mount removal
« on: February 22, 2013, 12:15:15 AM »
Thanks for the responses.

At least I was smart enough to experiment on something first before messing with my $2000 camera:

I know I said it was my 5D2, but I actually was playing with the mount on my 25mm extension tube to make sure it could be removed easily enough first. The reason is that I have quite a scratched mount on my 5D2 and was thinking I could replace it if it were an easy job.

I simply said 5D2 in the thread to for simplicity for getting my question across.

Now that I know my answer, however, I have another question as a result of my stupid tinkering:

Since I had the four mount screws out on the extension tube, will that too throw the focusing out of whack when used with another lens?




Thanks for the help and everyone's patience. In the future I'll try to make myself leave this stuff alone and control my OCD better.

114
EOS Bodies - For Stills / Re: Camera body lens mount removal
« on: February 21, 2013, 11:37:30 PM »
Oh wow, good to know. Thanks for the response. Definitely in over my head then...  :-\

115
EOS Bodies - For Stills / Camera body lens mount removal
« on: February 21, 2013, 10:58:51 PM »
Does anyone know how to take the lens mount off a 5D2?

I have the four screws out, but the mount won't lift off. I'm assuming there might be a slight lip to the mount that's preventing its removal.

116
EOS Bodies - For Stills / Re: Canon 2x and 1.4x mk3 extenders
« on: February 20, 2013, 02:20:32 PM »
That's a very useful trick for getting both extenders to work together! Thanks! Interesting that it still picked up the f-stop at 5.6.


Nice picture too!

117
EOS Bodies / Re: Canon EOS 7D Mark II Spec List [CR2]
« on: February 19, 2013, 04:07:03 PM »
Sounds a little too good to be true with the ISO and Noise performance. Maybe for JPEG...but RAW will be a different story. Either way, I am sure it will be a great camera!

118
Canon General / Re: Lone protester takes on the camera companies at CES
« on: February 15, 2013, 05:02:31 AM »
.
Welcome to Capitalism.

It's a hard and ugly thing.


...But still so much better than the alternatives.
Why? You assume there is only an alternative and in fact a worse one?

How about all other things being equal, companies try to play nice and still earn a lot of money in the process?


Anyways, back to topic...

I do feel for Pro Camera Repair. I have had nothing but good service from them and I will continue to support them as best as a"hobbiest" customer can with an occasional repair need. I am interested to find out more information on what's happening behind the scenes, however, as Mt Spokane Photography has pointed out.

119
Canon General / Re: Lone protester takes on the camera companies at CES
« on: February 14, 2013, 01:36:24 PM »
.
Welcome to Capitalism.

It's a hard and ugly thing.


...But still so much better than the alternatives.

120
Canon General / Re: Lone protester takes on the camera companies at CES
« on: February 14, 2013, 01:35:50 PM »
He definitely is right.

I have purchased several spare parts for my 5D Mark II through Pro Camera Repair and their service has been excellent. I will be incredibly upset if I eventually have to send my camera away to Canon for just a small repair I could have done myself much more cheaply and faster.

It sounds like pro camera repair tried to pull a fast one by selling lens test equipment and software that was acquired from Canon to independent Repair shops that were not on Canon's approved list.

It was a costly thing to try, and now they are claiming that they did not do anythiing wrong, when its obvious that they were trying to do a "End Run"
 
http://procamerarepair.3dcartstores.com/Canon-And-Nikon-Lawsuit_ep_51.html


Ahh, well the plot thickens then!

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