May 30, 2015, 04:37:46 AM

Recent Posts

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EOS Bodies / Re: Patent: Canon Tilt-Shift with Image Stabilization
« Last post by Lawliet on May 29, 2015, 02:44:46 PM »
I personally would find it more useful if Canon's TSE lenses could communicate with the image's metadata file so post lens correction such as CA could be accurately applied.
Patience, patience. They just innovated the TS-macro idea by looking at the H-system, it will take some time and iterations until it's other benefits make the same transition.  :P

Of course I understand that for flower photographers the IS could be desired by them.

For macro work you have all kinds of motion induced problems, with anything along the depth axis becoming dominant as magnification increases. That has some implications: Subject motion as well as the placement of the focal plane become a major issue. The most useful tools the deal with those would be a short flash duration and some sort of sharpness mask in LV, with stabilization solving only a low priority subset of the challenges.
Third Party Manufacturers / Re: Sigma 150-600 Sport image quality on TDP
« Last post by ahsanford on May 29, 2015, 02:44:32 PM »
Lenstip has NOT tested those lenses on crop. You have, unfortunately, misread the tests. They tested on the Canon EOS 5D MkIII and reported the resolution at the "edge of the APS-C sensor" - that is what the resolution is at a distance on the FF sensor which would correspond to the edge of the APS-C.

Lenstip has yet to test the 100-400 Mk II - it is indeed listed on the site, but it is untested.

Ah, yes.  I stand corrected.

- A
EOS Bodies / Re: EOS 5D Mark IV Testing Has Begun [CR2]
« Last post by neuroanatomist on May 29, 2015, 02:42:53 PM »

Nothing but speculation?  Is it speculation that Canon has been behind on low ISO DR for ~6 years?  Is it speculation that Canon has been and remains the dSLR market leader?  I make a logical conclusion based on facts.  Or if you prefer, it's nothing but speculation that the sun will set at the end of the day. 

Logic you say? Your premises does not support your conclusion, as I have already tried to point out but you obviously missed. I.e. you are just speculating or perhaps trolling. Does beeing a market leader mean they can't do better? No difference between 80% and 40% market share? How do you know how much or little of the market they miss out due to this DR issue?

I didn't miss your point.  No one knows how much or little of the market Canon misses because of DR, and by that token no one knows that the sun will rise in the morning.  But who is in the best position to guess the differential market share for  Me?  Or a company that spends significant amounts of money on market research?   We can observe where Canon has improved their dSLRs, we can observe what other manufacturers offer, we can observe market share.  From those observations, we can draw conclusions.  Canon has not substantially improved low ISO DR.  Other makers deliver more low ISO DR.  Canon remains the market leader.  Connect the dots, it's not hard. 

Hypothesis; If Canon had sourced the 36MP sensor used in the D810 and A7r (I think it is) and released a 5DS&5DSR version with that two years ago. What would have happened to their market share, up or down? I think the answer is obvious. Would it require massive R&D investments? No. Would Sony sell? Yes, they sell to everyone.

I don't think the answer is obvious at all.  Well, maybe it's obvious that market share would have increased, but by how much...and at what cost?  If a 5% increase in market share requires 20% greater production costs, is it fiscally sound?  Market share is important, but what really matters are revenues, profits, and shareholder value.  Would you like to have a company that had 100% of the market share for replacement parts for the Edsel? 

Consider that in the fourth quarter of last year, the Apple iPhone had ~15% of the global smartphone market share.  Pretty unimpressive, right?  Samsung is really clobbering them, right?  But...for that same quarter Apple had ~93% of the global smartphone profits.  So, who's clobbering who?
Technical Support / Re: Is there something wrong with this lens?
« Last post by Darkmatter on May 29, 2015, 02:39:51 PM »
I'll have to do it outside on a sunny day since I don't have a flash. I do mostly outside nature shots so putting money into a flash has been 2nd to the lenses up to now.
Industry News / Pentax to use Sony Sensor in Full Frame Camera
« Last post by Canon Rumors on May 29, 2015, 02:39:02 PM »
Pentax is set to announce their first full frame DSLR by the end of 2015, and the latest suggests that Pentax will use Sony’s current 36mp full frame sensor. The camera will apparently also have a high resolution shooting mode, a feature that appears in the brand new APS-C Pentax K-3II.

The K-3 II is the first camera in the PENTAX line to incorporate Pixel Shift Resolution® for capturing still life subjects with ultra-high resolving power. Pixel shift technology uses the camera’s in-body Shake Reduction mechanism to move the image sensor at single pixel increments, capture 4 separate images, which are subsequently combined into a single high definition image. Benefits include higher resolving power, reduced false color and improved overall image quality of non-moving subjects.

This could turn out to be a very interesting full frame option from Pentax.

Deals on Gear / Deal: Nikon D750 Body $1499
« Last post by Canon Rumors on May 29, 2015, 02:30:47 PM »
RedTagCamera (99.9% approval) is selling the Nikon D750 DSLR for $1499 (Reg $1999) via ebay.


  • 24.3MP FX-Format CMOS Sensor
  • EXPEED 4 Image Processor
  • 3.2″ 1,229k-Dot RGBW Tilting LCD Monitor
  • Full HD 1080p Video Recording at 60 fps
  • Multi-CAM 3500FX II 51-Point AF Sensor
  • Native ISO 12800, Extended to ISO 51200
  • Continuous Shooting Up to 6.5 fps
  • 91k-Pixel RGB Sensor and Group Area AF
  • Built-In Wi-Fi Connectivity
  • Time Lapse Shooting & Exposure Smoothing

Nikon D750 Body $1499 (Reg $1999)

Lenses / Re: Canon Developing a New Slower Supertelephoto Lens [CR2]
« Last post by RGF on May 29, 2015, 02:29:36 PM »
I certainly think there's a market for a 500 f5.6 LIS and a 600 f5.6 LIS
Especially if it's sharp wide open. Given that the new DO II optics look very good...these new lenses could be VERY small and light.

Given the price of the 400 DO, a 500 F5.6 and 600 F5.6 DO would be similarly priced.

Look at the prices of the 400 F2.8 and 600 F4.  Expect a similar ratio.
Technical Support / Re: Dottune distance: from lens or sensor?
« Last post by bereninga on May 29, 2015, 02:09:36 PM »
Hi bereninja.
Having made the mistake during AFMA of measuring to the front of the lens and being corrected here that I should have been measuring to the sensor you need to measure to the sensor (focal plane) which is marked on the outside of the body with the circle on a line.

Cheers, Graham.

Oh, that last part is very interesting. I'll check that out. Thanks for the info!

That's spot on. Further, if you routinely use your lens at a single fixed distance from the target rather than a variety of  distances, do AFMA at your most used distance.

Does this mean that if you use your lens at varying distances, it's mostly pointless to AFMA? If AFMA changes w/ distance, there sure are a lot of distances to test.
EOS Bodies / Re: Green cast on 6D screen
« Last post by AcutancePhotography on May 29, 2015, 02:01:43 PM »
I can understand this could be annoying and in a perfect world the LCD display should be clear, but is this not something that can be lived with, especially if you have tried three copies!

Is the green cast affecting the operation of the camera?

It stynks that this is happening, but if this is the only problem you have with your camera, I think you lucked out.
Third Party Manufacturers / Re: Sigma 150-600 Sport image quality on TDP
« Last post by 9VIII on May 29, 2015, 01:58:35 PM »
The 100-400 II is extremely useable, not too heavy, lighting-fast AF. The Sigma is really heavy and simply not a joy to use. IQ of 100-400 II is on the highest standards of a zoom lens. Walking miles along a coast line with the Canon and being quickly in a position to shoot seabirds is not a problem at all. To me, you cannot ask for more.

Actually, you could ask for 200mm more length.   :P

The Sigma will always have that in its favor -- Canon won't let you get to 600 without a teleconverter or a loan from the bank.  Give them some credit for delivering a solid product that doesn't cost a mint.

- A

When I look at the 100-400MkII on crop vs. the Sigma 150-600 S on full frame, they look virtually identical to me, maybe even giving the edge to the cropped 100-400MkII, and that lens is actually giving a 640mm equivalent FOV.
There's a lot of reasons to stick with the Canon.
If I had a full frame sport body already it might be a close call, but the 100-400MkII is a lens with very few downsides.
(Yes at f8 the Sigma improves a tiny bit more in comparison.)
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