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Messages - Mantanuska

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31
EOS Bodies - For Stills / Re: Help needed: Very slow live-view @ Canon 6D
« on: January 25, 2013, 07:43:36 PM »
As everyone has said, the camera is not intended to use autofocus in live view. However, when I was handling the 6D in the store a few weeks ago, I noticed the center AF point was fairly quick in live view. I am not sure if chaning AF points will help in live view anyway since the main AF sensor is still not being used, but when I was testing it out in the store it seemed to be much quicker than what you are reporting (with the 24-105 kit lens)

32
EOS Bodies - For Stills / Re: T4i vs 60D comparisons
« on: January 24, 2013, 06:09:59 PM »
Hi Folks,

Honestly, I have no idea how anyone can compare the 60D and the T4i...

I see posts that say, "ISO in between settings. T4i only has 400, 800, 1600".

This is Just Totally Wrong...!



He's talking about anything less than full stops, and no, the T4i does not do anything other than full stop ISOs

33
EOS Bodies - For Stills / Re: Potential upgrade from 7D
« on: January 20, 2013, 12:23:32 PM »
The only issue I see is that when you considering the crop factor of 1.6 the 15-35 is 24mm to 56mm.  And on a full frame camera, the 16-35 will actually be 16-35mm.  So you might want to look at one in person to make sure that your desired focal length is what you expect.  I'm not saying it will be TOO wide, but it might be. 

^^ what he said. You said you find yourself shooting at the 15-35mm range on your 7d, so you would want the 16-35mm for a 5D, but that would actually be 24-26mm on full frame. You can save yourself some money and just get a 24-105mm to start off if you don't think you would need to get any wider than the 15-85mm you are using now.

34
@titokane , I was already pretty sure that the camera would always override shutter, but just in case you were right I just tested on an EOS 50e and t4i . In Tv mode they are both limited to 1/200 and slower with the flash enabled. The fact that EXIF says the flash did not fire should tell you something is not working... if it did recognize the flash it would limit the shutter to 1/180.

35
Lenses / Re: New EOS-M Lenses Soon [CR2]
« on: January 17, 2013, 06:11:18 PM »

Do you realize what using a full frame sensor means......  it means that you need full frame sized lenses... remember the silly looking picture of the EOS-M mounted onto the 800/5.6 just after it was released.. that's the direction you head with full frame sensors.... large and expensive.

The Leica M doesn't seem too large .. granted it is a little bigger than the current EOS-M. 

36
EOS Bodies / Re: EOS not good for NASA?
« on: January 13, 2013, 09:35:55 PM »
NASA doesn't send people into space any more. This is irrelevant

37
Lenses / Re: lens for a lightpainter
« on: January 05, 2013, 06:48:43 AM »
If you need a wide zoom for the 7D and you dont want to spend the $300 extra for the canon 10-22, then the Tamron 10-24 is a pretty good deal. You wont be able to change the aperture mid exposure (not too sure why you would need to either), but there may be a workaround depending on what you are doing. I do a lot of long exposures underground and one thing that I find to be very useful is screen stacking in photoshop. it allows you to combine multiple exposures as if they were all shot on the same frame. so if you had two 30 sec exposures, you would stack them and end up with the equivalent of a 60 second exposure with the content from both frames. if you needed two different aperture settings for the same photo you could shoot them to different files and stack them later in photoshop.

Just about any lens out there is going to be sharp at f/5.6. The Tamron is not weather sealed, but I have been pretty lucky with it so far. Most of the places I bring it to have really fine sand. I just do my best to avoid getting sand on my camera and I haven't had any problems in the 14 months that I have had the lens.

In my opinion, the 17-40 would not be wide enough for a lot of light painting situations, assuming any of that is going to take place in a tight space, such as underground or in a building. It is also not dust /sand proof without a UV filter on, so could on spending another $60 on a nice UV filter if you go that route.

38
Data from the sensor has to be processed. It can be processed through hardware or it can be processed through software. Hardware processing is at least an order of magnitude faster than software processing, but at the expense of flexibility.



I'm not quite sure what you mean here. My understanding is that hardware is essentially useless without software instructing it what to do. You can't really have functionality without both being present.

39
EOS Bodies - For Video / Re: Video Autofocus on Canon 6D?
« on: December 28, 2012, 05:45:36 PM »
I own a T4i and I just checked out the 6D at my local store, and it seems like AF during live view is just as fast if not faster than with my T4i. I couldn't figure out how to do AF while recording (probably some custom function for that ), but I was pretty impressed.

I know it doesn't have a hybrid CMOS sensor but I thought it was pretty damn good.

40
Why are people even replying to this post?

41
Lenses / Re: Any plan for 50mm pancake?
« on: December 27, 2012, 12:21:30 AM »
Also, 40mm is closer to the flange to focal distance of 44mm for EOS cameras. A 50mm pancake would be less likely from that regard. Take a look at the EOS-M with a flange to focal distance of 18mm... the pancake for that system is 22mm because it is closer to the flange to focal than 40mm.  If you had a 22mm lens for EOS cameras, it would be a lot bigger than a pancake... 50mm might be close enough but I think the closer you are to the flange distance the easier it is to engineer, and less materials would be needed to make the lens, hence 40mm makes more sense from an IQ and price standpoint.

42
EOS Bodies - For Video / Re: World's First EOS-1D C Motion Image Shoot
« on: December 25, 2012, 01:51:09 AM »
It has an APS-H sensor...

B+H photo says the sensor is  24 x 36mm (full frame)

44
Lenses / Re: Infinity and Cold
« on: December 22, 2012, 08:10:41 PM »
I must admit that I've never understood why my Canon FD lenses can have a nice convenient hard stop at infinity and never suffered from any noticeable focus shift with temperature (and I did use them over a huge range) while my EF's don't have a stop and apparently have to be that way to deal with temperature extremes?

My understanding is that a lot of FD lenses do not have a hard infinity stop, which is what allows some of the longer lenses to be adapted for EOS and still be able to focus to infinity...
source: http://photography-on-the.net/forum/showthread.php?t=57023


As per the OPs comment, I think different materials allows for less thermal expansion/contraction. If the focusing element is on a plastic "rail" as opposed to metal, there would be practically no thermal expansion

45
EOS Bodies / Re: 6D Top Focus Point Light Bleeding Issue
« on: December 19, 2012, 08:05:06 PM »
Wouldn't you be able to fix this by putting in a different focusing screen?

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