August 18, 2017, 10:00:35 PM

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Canon General / Re: Gear for August Eclipse
« Last post by NancyP on Today at 09:01:45 PM »
7D2 plus 400mm f/5.6 on AstroTrac mounted on geared head tripod (key assist - clinometer to set latitude angle), with a Baader solar film home-made filter
6D with either 14 or 21mm lens (keep changing my mind) for landscape with eclipse
Eclipse glasses

Backpack with usual gear (lots of water, compass, map, bug juice, sun screen, towel, snacks), hiking poles, maybe umbrella, wear long pants, long sleeved shirt, hat, and take lightweight sit pad or stool.
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Reviews / Re: Petapixel: 6D vs 6DII, high ISO
« Last post by CanonFanBoy on Today at 08:57:18 PM »
I keep speaking of the damage done to IQ by a tilting screen yet no one listens.

Cory, I am not understanding this post. There is no IQ damage caused by the tilting screen and where have you mentioned this before?

Brian
Friends don't let friends tilt their screens.
You can't be serious.
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Let's see......

Comparing the spread of a FF AF sensor to the spread of a APS-C sensor.... a meaningless comparison.....

Comparing 45 points in a rectangle  to 19 points in a triangle.... once again, not really a comparison.....

Comparing a -0.5EV AF sensitivity to -3.0EV..... ok, that one is easy!

Comparing a 2009 camera against a 2017 camera..... once again, not really a comparison.....

As well, none of us have had a 6D2 long enough to really get a feel for the accuracy of the AF system, plus, as a new camera, there is not even an update for Reikan Focal for it yet, so I would also include in the list that we are comparing an AFMA'd camera against one that is not calibrated.

All that said, the AF system on the 6D2 APPEARS to be better, but until you can properly AFMA the 6D2,  all comparisons are with a * in the footnotes....
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I haven't used a 7D, but there's nothing wrong with the speed or accuracy of 6DII autofocus (it's great).  The issue is that since they took the (excellent) 80D autofocus system and dropped it into a full frame camera, there's a lot of real estate that isn't under autofocus.  I'm sure you can see pictures of the AF pattern.

Practically, is that an issue?  It could be, if you want to autofocus on something while using OVF, that's near any of the edges or corners.  It hasn't been for me; practically, my subjects are just not that near the corners, but I totally get the objection.

If you're using liveview, DPAF will allow you to autofocus anywhere; just tap on what you want focused on.  Or turn on touch shutter, and it will focus and snap the picture.  Worth noting, if you've never used it, dual pixel autofocus is awesome.

Why are we, again, hearing about "AF spread issues" when it's been demonstrated over and over that the 6D2's AF spread is comparable to the 5D series and the D750?  There is no issue unless you expect crop-level AF coverage on a FF camera.

I am not shure what you think is comparable, but the 5DIII has a wider and taller spread than the 6DII. And the 5DIV has wider spread than the 5DIII. It's easy to compare here. Scroll down to "Autofocus":

http://www.the-digital-picture.com/Reviews/Canon-EOS-6D-Mark-II.aspx

That's really not much difference.  It's overlaid here with the D750 that people were comparing it to pre-launch:

The af point spread is so awful!

Just for reference, the 6D2 AF point spread is almost identical to the D750; a bit better spread in the vertical direction and a bit worse in the horizontal direction.  The way the review presented it was a bit misleading.



And I just don't see any of these as meaningfully different.  Are you really going to be able to get the shot with one and not the other?  Really?  Your target would have to be so precisely just-outside-the-6D2's to be also in the others' AF points.  And then this really doesn't show you the true extent anyway, because the AF points extend past the indicated area on the VF.  And do we know the exact distance of that extent for all of these?  I just don't get how the difference here is enough to make someone's decision.  Like the 50mpx of the 5DS/R vs the 46mpx of the D850.
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EOS-M / Re: L-plate for the Canon M3 found
« Last post by HaroldC3 on Today at 08:20:09 PM »
I was wondering if this would fit the M6?  Hmmm might have to chance it but I need to compare the M3 vs M6 closer first.
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EOS Bodies / Re: Patent: Variable Curved Image Sensor Concept
« Last post by dak723 on Today at 08:10:40 PM »
I hope these curved sensors go no where, as it would make Canon's new lens design job easier, 3rd party lenses would have to be Canon-specific, and the general consumer would lose as a result.

Existing lenses would work the same and future lenses designed for this sensor should have much better performance on the edges and corners.  Sounds like a win win situation for everyone.
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Landscape / Re: Forests, Trees and Glades...
« Last post by LonelyBoy on Today at 07:56:55 PM »
Sunrise at the old farm.
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Canon General / Re: Gear for August Eclipse
« Last post by DanP on Today at 07:16:43 PM »
I will be using 5D Mark III with 1.4 III extender and 100-400L II at 560mm and f11 throughout the eclipse.  I'm using a Lee 100mm system with stacked 10 stop and 6 stop ND filters.  I've gone back and forth between the 1.4 III and 2.0 III, and have decided on the 1.4 III to ensure I get more of the corona (particularly if the sun isn't dead center in the frame).  I contemplated using the 2.0 III and regularly zooming between 400 and 300 on the lens, but decided that is just asking for trouble given the short window (and possibly focus changes).  I will be mounting the lens on an iOptron SkyTracker (the set up exceeds the stated maximum load capacity, but I tried it for 30 minutes and it worked quite well - hopefully I don't break it).  I will be using the TC-80N3 set for 1 minute intervals and bracket 3 shots 1 stop apart).   If I use ISO 100, the shutter speed needs to be 1/200.  I'm wondering a few things: (1) should I use a higher ISO to increase the shutter speed (e.g., ISO 400 and 1/800) - what is the maximum ISO I should use?; (2) Is leaving the camera on and in Live View for the entire eclipse (153 min) going to cause a problem (e.g., heat build up - it's predicted to be 30 C on eclipse day where I am going in Oregon plus sun hitting camera).   I will be taking a power pack with inverter, so I can use the 110v power adapter and won't have to worry about changing the camera battery.  I will handle the diamond ring and full eclipse through different settings and more bracketing set into C2 & C3.
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I haven't used a 7D, but there's nothing wrong with the speed or accuracy of 6DII autofocus (it's great).  The issue is that since they took the (excellent) 80D autofocus system and dropped it into a full frame camera, there's a lot of real estate that isn't under autofocus.  I'm sure you can see pictures of the AF pattern.

Practically, is that an issue?  It could be, if you want to autofocus on something while using OVF, that's near any of the edges or corners.  It hasn't been for me; practically, my subjects are just not that near the corners, but I totally get the objection.

If you're using liveview, DPAF will allow you to autofocus anywhere; just tap on what you want focused on.  Or turn on touch shutter, and it will focus and snap the picture.  Worth noting, if you've never used it, dual pixel autofocus is awesome.

Why are we, again, hearing about "AF spread issues" when it's been demonstrated over and over that the 6D2's AF spread is comparable to the 5D series and the D750?  There is no issue unless you expect crop-level AF coverage on a FF camera.

I am not shure what you think is comparable, but the 5DIII has a wider and taller spread than the 6DII. And the 5DIV has wider spread than the 5DIII. It's easy to compare here. Scroll down to "Autofocus":

http://www.the-digital-picture.com/Reviews/Canon-EOS-6D-Mark-II.aspx
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Travel / Re: lens choice for Yosemite
« Last post by privatebydesign on Today at 06:11:32 PM »
Which one do your filters fit on.
I would go with it.

I wouldn't give a second thought to filters unless you felt the need to use a CPL, which has limited use on ultrawides and panos anyway. For everything else I'd bracket and blend.

That could work to.
I guess if we were using a camera with enough DR we wouldn't even have to blend. Just adjust.

Depends what you consider enough and how much you might want to move any tones within the image. Certainly it isn't out of bounds to do three stop lifts to shadow areas in valley landscapes and nothing gives you better tonality than an optimally exposed image, which would suggest at least two exposures. Throw in the fact than mountain/valley landscapes practically never lend themselves to split filters it makes blending a technique capable of higher end results than many filter solutions.
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