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Topics - GuyF

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Technical Support / Bug in ImageBrowser EX 1.0.1?
« on: August 18, 2012, 02:30:03 PM »
Have any of you come across this "phenomenon" as Canon would refer to it?

After copying RAW files to my PC (Win 7 64bit) I'll often quickly review them in the preview mode of ImageBrowser EX 1.0.1 before deciding what keepers are worth enhancing etc. The weird thing, sorry "phenomenon", is after viewing quite a few (maybe 60 or 70+) the preview becomes really low res and things continue like this for each image from there on. If I go back to previous shots in the sequence they are fine. The exif data and histograms are all okay but the images from a certain point onwards are shown in very low res. Doesn't matter what preview mode I select - full screen or whatever, the images remain low res. Only solution is to close it down and restart and things are fine.

Not the biggest pain in the world but weird none the less.

Have I stumbled upon secret evidence that Microsoft would prefer us to shoot Nikon?? I think we should be told.

Lenses / Lens choices for airshow
« on: August 16, 2012, 01:53:08 PM »
Should be going to the Leuchars airshow on Sept 15th here in Scotland and, since it's the first airshow I'll have been to in over 20yrs, wondered about the best choice of lenses.

Main gear will be 5D3 plus 300mm 2.8 IS (and Kenko 1.4x TC) (without monopod as I think it would be too restrictive).

However now the problem starts - do I also take:

24-105mm for static stuff (B-52!!) and wider field of view flying shots (Red Arrows/Patrouille de France)


17-40mm for static aircraft and 70-200mm f4 IS for Red Arrows/Patrouille de France?

No doubt some will say take it all but I want to travel as light as possible but not miss shots by leaving stuff at home. Bearing in mind I'll also be carrying food and water for a long day.

Next part of the question is: to ensure razor sharp shots of the flying displays am I better shooting at, say, f8 and let the 5d3 take care of the rest or shoot close to wide open to maintain high shutter speed and rely on the focus tracking of the 5D3 to keep up with fast jets?

Any opinions and airshow example shots would be appreciated.


Lenses / Keep 70-200 f4 IS or go for f2.8 IS II?
« on: July 20, 2012, 02:17:25 PM »
Having recently moved from a 40D to a 5D3 I'm possibly in the position where I can sell my current 70-200 f4 IS to a colleague and get a f2.8 IS mk2.

Whilst I've read about all I can about the f2.8, I still need some convincing:

1. The f4 is fantastic. It's sharp and light enough that I can carry it around all afternoon in my hand without any bother.
2. The f2.8 is faster and the IS is no doubt better BUT it is almost twice the weight of the f4.

As I have arms like wet noodles the weight is a slight issue for all-day shooting but not necessarily a deal breaker (I've got the 300mm f2.8 IS too but I don't handhold it all afternoon).

So the real question is: is the f2.8 IQ significantly better than the f4? (The fact it should focus quicker and track better with the 5D3 is also a given).

What should I do?

Thanks for any opinions.

Pricewatch Deals / Euro 2012 Cashback - anyone got their money yet?
« on: June 27, 2012, 02:12:21 PM »
Having used Canon's cashback offer a few years ago with my 40D I know their concept of time is elastic. Any UK customers got their cheque yet under the Euro 2012 offer? If so, how long did it take?



EOS Bodies - For Stills / 1D X - what do TIPA know that we don't?
« on: June 10, 2012, 05:44:14 AM »
Flipping through a magazine yesterday and came across the results of the 2012 Technical Image Press Association awards. Best DSLR (professional) goes to the, as yet, unavailable 1D X. Just for the wild optimisim that they show I kinda wish the 1D X gets delayed 'til January. That'll teach 'em! And at this rate that isn't too far fetched.


Anyone else know of gear winning top awards before the finished production article hits the buying public?

One thing that makes me a wee bit suspicious of the whole TIPA award thing is that just about every manufacturer gets an award - best premium camera goes to Leica. Who defines what "premium" means?

Still, kept me amused for a few minutes.

There's an interesting article in the May issue of the British Journal of Photography that compares the low-light capabilities of the 5D mk3 and Nikon D4. Both cameras use their own 24mm f1.4 lenses in the article. As I've just bought a mk3 and Sigma 85mm f1.4 I thought the article would be pretty informative but was quite surprised to read:-

"Fast lenses are only part of the solution, as the microlens structure of sensors has the effect of limiting the maximum effective f stop - you get the reduced depth of field, but not the true lens speed. To compensate for this, camera firmware detects apertures faster than f2.8 and applies additional  gain. You must add the gain mapping applied at all apertures to compensate for vignetting."

It goes on to say that shooting at f1.4 and ISO 6400 will probably give you ISO 25600 in the corners. Yikes!

Well, you learn something new every day.

I guess those shooting Leica with a Noctilux f0.95 must feel robbed!

Lenses / 17-40mm and DPP
« on: May 27, 2012, 02:39:32 PM »
Just ordered my 5D mk3 plus 24-105mm and wanting either a 17-40mm or maybe the 16-35mm if my piggybank can stand it. I know the 17-40mm has more CA and distortion but wondered how well images can be cleaned up using the Lens Optimiser part of DPP - any comments?

Thanks for any opinions,


Third Party Manufacturers / Tamron 90mm macro or Sigma 150 OS?
« on: May 26, 2012, 11:10:41 AM »
I've currently got the Tamron 90mm but have the chance to sell it to a colleague. Is the Sigma 150mm f2.8 OS a better lens? I'll be using it with a 5D mk3 that I intend buying very soon.

Has anyone compared the image quality of the two lenses directly?

(I've already discounted the Canon 100mm as I've got a couple of lenses that would cover portrait shots etc. hence the potential leap to 150mm.)

Any thoughts?



Technical Support / 300mm f2.8 IS and Digital Lens Optimiser
« on: May 26, 2012, 10:54:13 AM »
I contacted Canon to ask if a lens profile for the 300mm 2.8 IS mk1 would be made available since they have one for the mk2. No reply. Hey ho. Anyone know if Canon are going to add to the profile database?



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