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Messages - Mt Spokane Photography

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31
Lenses / Re: Canon 400mm f5.6 in combo with the 5D3
« on: October 13, 2014, 09:57:16 AM »
It all comes down to the type of sports and the lighting.  If you have a 1/2000 shutter speed and low light, then the high ISO will reduce resolution, but the 5D MK III does reasonably well at up to ISO 12800.

32
EOS Bodies / Re: AA Filter: Still Relevant, Marketing Ploy, or Obsolete?
« on: October 12, 2014, 11:55:32 PM »
There are different kinds of AA filters.  They are usually combined, but some leave out the mechanical filter and use digital filters instead.
 
Basically, a AA filter is a lowpass filter that eliminates MoirĂ© by eliminating frequencies above the Nyquist frequency.  A perfect filter would be like a square wave and cutoff at the exact frequency.  In reality, the frequency cutoff is a roll off function, so it affects frequencies below Nyquist, and still allows some above Nyquist to pass.  A Combination of digital and optical can give a sharper cutoff, so there is also a filter in the electronics processing the data from the sensor.
 
You can eliminate the optical filter, and do as good a job as possible with the digital filter, but it will let more high frequencies thru, and thus, more MoirĂ©.  Its a complex balancing job, but is made easier by high MP sensors.
 
There is continuing work going on because of the big payback.  Here is a older paper describing the development of a combined optical and digital filter.
 
http://www.imagesensors.org/Past%20Workshops/2001%20Workshop/2001%20Papers/pg%20076%20Kimura.pdf

33
EOS Bodies - For Stills / Re: Buying 2nd hand 70D, what to check?
« on: October 12, 2014, 09:22:42 PM »
Hi Guys,

I am buying 2nd hand 70D,

Was wondering what do I have to check by myself & will (usually) official country dealer willing to check the condition of the camera for me?

Moreover, how to check if the camera is original and not some chinese knockoffs (if any)?

Its just that I found some websites in Indonesia selling brand new 70d kit for approx. USD200, which doesnt make sense.

Thanks

You have to use common sense.  If its too good to be true, its a scam.  Along with Nigeria, Indonesia is known for scammers.
 
 
You need to lookup a list of Canon repair stations in your country.  Check the Canon web site for your country to find a contact.

34
Lenses / Re: Versatile macro-ish walkaround zoom for dad
« on: October 12, 2014, 12:51:24 AM »
He might rather use something like the G1X which has a close up mode as well as a 24-120 equivalent zoom mode.  The Sensor is almost as large as a crop, so it has good IQ.  I'm not much younger than your father either, and I'm starting to find it useful as a walk around camera.
 
Attached are some photos, original and a severe crop.  It will focus closer than that, but I did not want to get the hornet angry.
 
 

35
EOS Bodies / Re: Wifi on 5D MK IV?
« on: October 12, 2014, 12:32:29 AM »
I really liked the Wifi on the 6D, and was kind of shocked it did not turn up on the 7D MK II...  what do you think the chances of it appearing on the 5D MK IV?

The chances are near zero.  Canon already said that on the 7D, the metal body did not allow for a good Wi-Fi signal.  A 5D MK XX is going to have a metal body.
 
Cameras like the 6D or Nikon D750 with plastic panels or bodies can have Wi-Fi.  Its a trade off.  You can purchase a Wi-Fi adapter. 
 
I have a eye-fi card that I use in my 5D MK III with no issues, I do not know what the range is, but it works fine within 50 ft of my hotspots.  It also works far better than Canon's Wi-Fi implementation in my G1X MK II!  I can pop it into any of my Canon cameras, including the G1X II, and use it without fooling around for hours to get setup.  The setup is in the card, not the camera.  I've bought a adapter to adapt the eye-fi card to a CF slot, so I plan to try it with my 5D Classic.

36
The Larger sensor gives the best low light performance.  I think that my G1X has better IQ than any of the G7X photos I've seen, DPR has photos from a production camera now, and they seem to lack detail. 
 
I've yet to use my camera in extreme low light situations as of yet.
 
You can use the DPR studio image comparison set to ISO 3200 Raw and compare it to the Sony RX100 III which has the same sensor as the Canon G7X. 
 
The large sensor of the G1X wins handily at ISO 3200, its not even close.  It looks very close to a 70D.
 
At low ISO's where noise does not eat up the Sony cameras resolution, its more even, but there is more detail and contrast in the G1X images at ISO 100.
 
 
http://www.dpreview.com/reviews/image-comparison?attr18=daylight&attr13_0=canon_g1xii&attr13_1=sony_dscrx100m3&attr13_2=canon_eos70d&attr13_3=canon_eos5dmkiii&attr15_0=raw&attr15_1=raw&attr15_2=raw&attr15_3=raw&attr16_0=3200&attr16_1=3200&attr16_2=3200&attr16_3=3200&normalization=full&widget=1&x=0.25523809523809526&y=0.6934091157503552

37
Exactly what did you transfer images from?  You mention using a SD card, and that it has a solid Wi-Fi connection. 
 
Was this from a smart phone of some sort, or a camera, or did you insert a SD card in the drive.
 
I'd hate to have to wait for one of my 64GB cards to download if a 8GB card takes 18 minutes.

38
EOS Bodies - For Stills / Re: Upgrading - What To Expect
« on: October 11, 2014, 12:06:29 PM »
Don't expect images to be noticeably better.  You are buying additional mechanical features, such as top LCD, joystick, long life shutter, more fps, etc.  In addition, there are the dual processors which allow the fast data flow and image processing.  Dual Cards.
 
The new sensor will have a little better high ISO, maybe 1/4-1/2 stop.
 
If you obsess over defects at the pixel level, there should be less, but a large print is not going to be any different.
 
Have fun with it, its a nice camera, but realize that its about sports features more than any big jump in IQ.  All DSLR's produce excellent images when a user exposes properly.

39
EOS Bodies - For Stills / Re: Why would Canon pick this combo?
« on: October 11, 2014, 11:54:49 AM »
A white box 24-70 f/4 is probably worth $650 - $700 on the used market, so you can flip it and make $150-$200 quick profit.  This is a way of discounting a new camera.
 
Canon does not want to offer a deal with a 17-55 front line lens.

40
Sports / Re: Superbikes from Silverstone
« on: October 10, 2014, 08:50:11 PM »
Somehow, after 100 years of sports photography with single shot manual focus cameras, even press type cameras that required changing plates after each shot,  some seem to think that you need 10 fps and autofocus for sports.  In my opinion, it is still possible to capture sports with good timing and one shot.  I have had a 1D MK II, MK III, and MK IV, and I have tried high fps for capturing fast moving objects.  Only rarely did I capture anything better than a single shot would have done, and I had to go thru large numbers of frames to find the one I liked.
 
The only cameras that I find difficult for sports are the slow P&S cameras that seem to think about closing the shutter foe 1-3 seconds which makes it impossible to anticipate the moment.  Now, even P&S cameras are much faster, my G1X could almost do it.
 
 

41
You're right, I misunderstood.  My brain refused to believe that Sigma would do something that useless and stupid.

I stopped buying Sigma after my five Sigma lenses plus a 28mm f/2.8 rebranded to a generic name all refused to work with my DSLR's.  I had to pay $100 to get my Sigma 105mm macro updated, my 400mm and the other 4 lenses became worthless.
 
I was just getting to the point where it seemed that they might be reliable enough to consider buying one, now, I'm wondering what other surprises we might see.

42
From the comments on that article:

"I asked Sigma. Here's what they say:

The converters will work allowing the features they were designed for but not the features of the new converters. Autofocus would be limited to an f/stop of 5.6 or faster when the converter and lens are together."

So, the compatibility issue seems to be the ability to focus at f8.  It seems insane that this is going to be limited to only the three newest Sigma telephotos and not usable with AF at f8 on any other lens.  I can't even imagine why they would do this since it must be devastating to potential sales. 

On the plus side, you can put a 1.4 TC on the 150-600 Sport and get AF on the 7DII!  Sounds like a great budget birder.
The question addressed is in reference to use of the older TC with new lenses.  The new TC's are only compatible with the three new Global Vision lenses listed and only after a FW upgrade.
Guess I'll keep my older TC, it works just fine.

The big issue is the lenses (Future ones will have the new firmware) that cannot stop down below f/5.6 with a Sigma TC.  No info at all about Canon or Tokina TC's, but don't expect them to work without checking first.
 
When you put a f/1.4 TC on the 150-600, it effectively becomes f/8, but with a TC, stopping the lens down usually improves sharpness.  It sounds like you are being roped into buying the new Sigma TC if you want to use one with the lens.  You can get autofocus at f/11 with a 7D MK II in liveview, so a 2X TC that works with the 150-600 is usable with autofocus.  I have no comment about IQ with a TC.

43
This is very weird.  The forum will be full of posts from those who bought one and it won't work for their Canon or Tokina lenses either.
 
Since everyone will eventually update their firmware in the new lenses for one reason or another, its a mess if Canon TC's won't work with them. 
 
I wonder if the error keeps the lenses from focusing , stopping down, or locks up your camera like the Tokina TC's do with certain lenses?  Maybe just error 99??
 
I certainly would hold off on one of the new lenses if I had to buy dedicated TC's just for them.

44
Technical Support / Re: Pink/purple streak in pics when using live view
« on: October 10, 2014, 01:14:24 PM »
A lot more heat is generated during live view, not just from the backlight on the LCD, but the snsor gets warm as well.  If left on too long, and the camera is in a warm location, it will go into overheat shutdown.  Its also possible that components in the camera are drawing more power than normal, which makes them run hot.

45
Lenses / Re: 24-70 swap
« on: October 09, 2014, 12:33:04 AM »
You might want to look at Lens Rental's comparison, he checked 24 copies of the 24-70mm f/4 and compared them to the 24-70MK I, MK I, the 24-105mmL, and even the Tamron 24-70mm f/2.8.
 
Form your own opinion.  Roger will be the first to admit that his numbers do not tell the whole story, there are lots of other factors to consider.
 
http://www.lensrentals.com/blog/2013/01/canon-24-70-f4-is-resolution-tests

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