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Messages - Stu_bert

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46
Lenses / Re: Which supertele?
« on: March 26, 2013, 03:01:40 AM »
Hey,

Since you have the 70-200 f2.8 , I would def. go for the 500mm f4 !

The 300 is superb off course, but it is pretty close to your 70-200 in reach.

The 500 is still hand holdable and since you use full frame cameras the choice of going for 500 for sports / wildlife is even easier ! (in my view)

I briefly had the 300f2.8 IS and 500 f4 IS, but got rid of the 300 f2.8
I found 300mm not long enough (even with 1.3 crop body)

I haven't checked this but i can imagine the appearance of a subject size between lenses (ratio) can be expressed as

500^2/300^2 = 2.777 times bigger (same distance a subject would appear 2.8 times bigger)

200 vs 300 = 2.5 bigger
200 vs 500 = 6.25 bigger

bigger meaning surface area of subject ( ratio's again)
Sorry if that logic is flawed, but i think it should be pretty solid since it's a 2 dimensional problem:P
Hope it is helpful

The logic is flawed, unfortunately - the resolving power depends on the focal length of the lens, not the length squared as it is a 1 D problem.  Two lines can be resolved if the image on the sensor has them separated by two pixels.  The size of the image depends on the focal length of the lens. So, a 300mm lens gives you 50% more reach than a 200mm, a 400mm 33% more than a 300mm, and a 700mm 16.6% than a 600mm, all things being equal.
But does not the reach expand your subject in both axis/dimensions, therefore if you are talking surface area or % of the sensor covered, then what apop says is correct? Agreed, reach, but not % of sensor...

47
Its about time Canon responded to the Nikon D800 and D800E. This fixation with high ISO, low DR, and high noise needs to stop. We need a quality camera to bring back the 1Ds range, a camera that is best in class.

For whatever reason Canon have been asleep at the wheel for a while now and its time they woke up. I have no wish for ISO extremes, nor do I shoot video at all, but I do shoot landscapes, so want a camera that has a minimum of noise and world beating DR. Maybe removal of the anti-aliassing filter?

It's a valid fixation.  There are many more sports and wedding photographers than landscape photographers.  Hence why Canon has dominated the market.

High ISO if clean is great for landscape shots when movement is not desirable - for instance freezing stars without wishing to get star trails. If you're taking shots from a moving plane, then faster speeds are essential (>1/1000th is ideal). Add in the desire to shoot in the golden hour, and suddenly higher iso is useful. Finally, as has been mentioned, not having to take a tripod everywhere opens up flexibility - although I appreciate that may be negated by the higher resolution.

1Dx bodies are also perhaps better in harsher conditions - be that cold, wet or sand, all often encountered by landscape photographers.

I thought as mentioned in other threads, Canon's latest L glass is not sensor limited. And certainly not by a 40MP sensor.

Finally, as also mentioned elsewhere, higher MP resolves the subject detail better.

Cropping is useful, even for landscapes, where you can't change your position or zoom - for a variety of reasons.

The simple conclusion is of course, everyone has different needs. And sure, eventually, Canon will try and satisfy them all, but they're never gonna keep everyone happy...

But then if they did, these forums would be a lot quieter  ;D

48
The lag between announcement and delivery is based on manufacturing ramp up time for FF using a modified process and the fact that Nikon will produce theirs first. Let's remember we still want Canon to be in business, so yes they will pre-announce...

SATA III drives max out at around 400-500MBps (real-world) not Mbps, so I don't think the i/o subsystem is a bottleneck  :D

Exmor is equivalent to Digic, not the sensor....

I agree with the other post and have said before - Canon released updated glass first as they can get revenue ahead of the sensor improvements on both the 7D II and 1DxL :D

USB 3 / thunderbolt - I've only ever used USB to control the camera - do others prefer to use these i/f to offload pictures etc? The Ethernet on the 1Dx is faster than the CF card, as would be the USB 3 and Thunderbolt, so not sure the benefit of adding a faster i/o ports without faster CF, unless you are tethered....

Photographers asked for better high iso, and the way Canon chose to do it, presumably based on sensor limitations was to reduce the MP slightly. They're a business and thus want to respond as best as they can with the tech they have to retain you. Pretty normal IMHO....

Overall, when I read these threads I am reminded on Tom Hogan who normally calls it correctly when he said with the current cameras from Nikon & Canon you really can't blame the camera on making bad pictures, only the photographer.... :D

49
Canon General / Re: your scariest photography moment?
« on: March 11, 2013, 01:38:01 PM »
Some great stories, thanks to all...

Silliest moment - aside from the normal misreading the tides and getting "stranded" on the english coast, my best to date would be diving/slipping into a stream with 1Ds and 17-40mm attached with tripod. Photographer and equipment fully immersed and not an underwater housing kit to be seen! :-[ Left everything for 24hrs drying and it was all fine...

For scariest, they're all animal related...

I've had a herd of springbok get suddenly spooked and dart towards the car and one hit the rear but shook his head somewhat dazed and ran away...

What always scares the beejezus out of me is self-drive, narrow roads, herds of elephants in close proximity. I was in Kruger a couple of years back, heading down a backroad. Came across a bull. Normally if I approach slowly but consistently, the elephants will ignore me. Not this bull. He proceeded towards me. I paused, perhaps that was my mistake, but then I went forward again. Like a game of chicken, he keeps coming, I advance slowly. When he shakes his head a little, it was time to retreat. 500 yds back to the T junction I wait, deciding I could either go backwards with a quick u-turn, or floor it forwards if he continues.

Then out of my left field of vision comes another elephant and the penny dropped. He was in musth and not interested in me. I watched him court the female with his demonstrations of destruction, and after about 5 minutes she turns and trotts off and he follows at a pace. I decide to go back to where I was heading and leave them in peace....

For the rest of that holiday, whenever I came across a herd, especially on the narrow roads where literally the brush almost touched the side of the vehicle, I could always feel my throat, the adrenaline and the stomach acid  :-[ Funny on how I spent half the time considering where I could quickly throw the vehicle into reverse if I needed to get away from a charger  ;)

By contrast, driving through a herd of buffalo at 5:45 in the morning, because a hundred of them decided to block the road was a lot easier... I drove slowly but surely, and they parted without issue. So long as they are not frightened, then it's normally all good....

Oh and finally, never back away from a warthog... I did that when walking to a water hole hide, and he decided that meant he had the upper hand. Fortunately there were some decent size stones near by and i had my monopod. Neither was required, just a bit of patience and his lost interest  :D

50
EOS Bodies / Re: Canon EOS 7D Mark II Information [CR1]
« on: March 08, 2013, 05:24:45 AM »
If the lens motor was receiving the same power from a 1D X and a 7D, then the AF speed for the lens would be the same with both bodies.  But it's not, it's faster with the 1D X.

Could it be firmware trickery on the part of Canon, the 7D delivers the same power as the 1D X, but the 7D just tells the lens to AF slower?  Possible, I suppose...but that seems a little too cynical, even for me.   :P

This is something that has puzzled me about saying the lens is doing the AF. The lens does not have the AF points and it does not see the image, so how can "the lens" be doing AF.
As far as I can understand this, the camera is doing the AF and is telling the lens motor to rotate the lens to bring the image into focus. If I am wrong, please point me at something that explains it. I have read the generic description of the AF process, just nothing that would correspond to the notion that the lens is doing the AF.

Focus is achieved by the movement of element group(s) within the lens.  Canon EF lenses have a motor within the lens that moves the focusing group.  The 1-series bodies are able to drive that motor faster. The camera tells the motor in the lens how far and which direction to move.

So that was always my understanding until I read this in the 400mm mk ii review over at TDP

Quote:

The 400 f/2.8 IS II has received some AF upgrades from the 400 f/2.8 IS I - new dedicated AF algorithms and a new high-speed CPU. How well they work is of course what is important.


So does this not indicate more intelligence in the lens. Anyone know for sure??

51
EOS Bodies / Re: Canon 1DX vs 5DIII Wildlife Comparison
« on: March 02, 2013, 05:27:32 AM »
AWSPhotography - well if you don't mind a grey-import then UK is not more expensive....

I figure the chances of Pro Canon equipment going wrong within warranty is pretty unlikely, plus all their equipment is made in a handful of locations in Asia. If you want full warranty, fair enough. I've bought three 2nd hand 1D series bodies without issues, so I figure grey import is less risk.

I've used procamera in the uk (no affiliation), and their price compares well to Adorama / B&H / Amazon.

Like you I am considering a 1Dx or MK III, but really want to wait and see if the new bodies have (even) better noise handling (I do nature, travel & landscapes), so need a mix of capabilities....

52
EOS Bodies / Re: Canon's Roadmap for 2013 [CR2]
« on: January 27, 2013, 10:52:56 AM »
Guess I'll be spending most of my cash on trips around the globe using my "outdated" kit but still taking great shots... (that's the camera, not me  ;D)

It will be interesting if a 7D MK II has better sensor tech and how that will sit with the 5D / 1Dx - that's a balancing game for Canon. In that respect, I think Nikon have had an advantage being able to implement it across most of their range. Canon has a more tricky introduction. They could bring in something more expensive than a 1Dx (High MP) with better sensor tech without too many issues as it will not have the same high frame rate.

That gives them another challenge with the 7D II - if it matches the AF of the 5D III and has better sensor tech, then will they "hold back" to ensure it does not offer a compelling alternative to the 5D / 1Dx, or will they follow Nikon and accept cannibalism across their ranges? I guess they might, but balance it by pricing it above the 5D III and below the 1Dx with a higher MP body to redress the "balance" in the Pro range...

I'm guessing a 7D II in the autumn above the 5D III and a High MP announced at CP+ 2014

53
United Kingdom & Ireland / Re: Selling used gear UK
« on: January 25, 2013, 07:50:38 PM »
thank you Schruminator

54
United Kingdom & Ireland / Re: Selling used gear UK
« on: January 24, 2013, 01:57:38 PM »
I'm also facing the same dilemna. Can I ask all of the previous respondants, what sort of kit you were selling? I assumed that L lenses would be sold by serious sellers and therefore you are more likely to avoid spammers and the like?

55
EOS Bodies - For Stills / Re: 1DX import issues (not my camera)
« on: January 18, 2013, 07:48:08 PM »
Put the card back in the camera and hit preview... if they're all fine, then it's the card reader... You can transfer from the camera via usb cable. If they are corrupt, then as Neuro said, alas it seems like a corrupt or worse faulty memory card. If your friend has a 2nd card, that should eliminate the source. Try reformatting the card, writing some shots and reviewing to eliminate the card. If a 2nd card has the problem, ideally different brand, then sounds like a weird fault on the 1Dx....

Oh and check pins in the slot that none are bent....

56
EOS Bodies - For Stills / Re: Thinking of downgrading my 5d3 system
« on: January 06, 2013, 05:26:49 AM »
I think what you haven't mentioned, which has a lot of implications, is when you bought all that kit, what did you intend to do with it? What style of photography and where? And why do you feel you are not able to do it? Is it solely the weight?

When I do vacations with family I tend to do sunrise & sunset by myself, and during the day stay with family (while scouting locations for sunset / sunrise).

Before you change anything, I think you need to look at what is preventing you from achieving your original aims with the MK III

57
EOS Bodies / Re: Does a 39.3mp Sensor Exist? [CR1]
« on: January 02, 2013, 06:37:54 PM »
Yes, diffraction is happening in the lens regardless of the sensor, but the advantage of the higher MP sensor is lost much easier to diffraction. If you have two cameras, one 20MP and the other 282MP, and shoot both with a lens set with its aperture smaller than f11, there will be no difference in resolution between the two. The higher MP body won't be worse - it just won't have any advantage. But shoot at f5.6 with a great lens, and the 282MP sensor will be able to resolve 70MP of detail while the 20MP sensor is limited to 20. So while 282MP clearly holds an advantage with a great lens in that particular scenario, why bother with 282MP? Isn't the cut off of where a FF sensor should ever go to somewhere around 70MP or below? And if its a video optimised sensor, 39.3MP seems like the ultimate destination for FF if video remains based on a multiple of 1080p (4k or 8k), even hundreds of years from now.

File sizes are a major concern when using these large sensors. As you said, the resolution of the D800 is too much, too soon for event shooters with current computers.

I was looking more into how far it is worth going based on the laws of physics, assuming sensor tech and storage/processing all continue improving, making these resolutions easy to capture and post process.
There are very sound arguments for up to 400mp, but with big caveats. http://theonlinephotographer.typepad.com/the_online_photographer/2009/02/why-80-megapixels-just-wont-be-enough.html

Going to the extremes of a 400MP FF sensor will allow you to see 400MP of beautiful blur up close when viewed at 100%, unless a lens exists to resolve 400MP of resolution at f2.3 and wider apertures. Having said that, software enhancements such as SmartDeblur, if further refined could turn those extra blurred pixels into meaningful detail:

http://www.petapixel.com/2012/10/21/smartdeblur-does-science-fiction-esque-enhancing-on-blurry-photos/

I still reckon 20 odd MP is enough for most people, and 70MP without any artificial enhancement should be more than enough for any real life situation.


The article linked by privatebydesign indicates that raw engines overcome some of the diffraction limitations, otherwise surely a 7D sensor would have the same problem as the D800 and be noticeably impacted by diffraction after f/8?

58
EOS Bodies / Re: Canon DSLR Body Rumors for 2013
« on: January 01, 2013, 02:27:36 PM »
The 1Dsx will do for me provided Canon manage to leapfrog Nikons current world beating performance with the 800E. If they can achieve that, then I will be in heaven, if not, then its goodbye Canon. I'm not hanging about if they continue to produce cameras with noise and banding issues but with excessive ISO figures.

Having said that, my present 5DII is OK for the moment, so I would rather they spent more time getting it right than a rushed "knee jerk reaction".

Just interested, what do you think an $8,000+ 38+MP camera will do for you when you can currently live with a $1,300 21MP 5D MkII? What do you shoot now, and what do you do with your output that would necessitate such an upscale?

D800 has higher dynamic range and also more resolving capability. Does not infer you need the high MP, just some of the other features....

59
Lenses / Re: 500 x $10K or 600 x$13K
« on: January 01, 2013, 02:17:54 PM »
How did this thread go from 500 vs. 600 to cropped sensor vs. FF?  He already have a 1DX and is not asking about 7D vs. 1DX plus 1.4X.

Err does it matter  :D ?

60
Lenses / Re: 500 x $10K or 600 x$13K
« on: January 01, 2013, 02:16:57 PM »
I did a 'quick-and-dirty' test (static scene, not my ISO 12233-type chart) soon after getting the 600 II, comparing the 7D vs. 1D X + 1.4x.  The 1D X + TC was a little better at ISO 100 and a lot better at ISO 3200.

The original test was with the 100L, no extender. The point was to simply compare the crop sensor vs. cropping the FF image to match FoV.

Cool thank you.

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