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Topics - Redreflex

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EOS Bodies / Bokeh difference - full frame vs crop??
« on: October 26, 2011, 09:12:21 PM »
I recall reading somewhere on this forum some comment about how a FF sensor would inherently have better bokeh (or was it shallow depth of field) as compared with a crop. I can no longer find it, and I have since read conflicting opinions elsewhere.

Thus, if an image is captured at the same aperture and full frame equivalent focal lengths on both types of cameras with the same lens, would there be a difference in bokeh and/or depth of field with the 2 different camera types?

If so, is it a theoretical or real difference, and why? Any sample comparison images would be very helpful!

Here's a comparison of relative pixel sizes. Quote from Chuck Westfall (Canon USA Pro Engineering division) via dpreview: (

When asked to for the biggest improvement in the new camera, Westfall stresses that every aspect of the camera has been re-assessed but finally concludes: 'If you had to highlight just one thing, I'd say the sensor. It's a new level for us in terms of image quality.'

'There's a couple of things that we consider when we think about IQ: number one on this sensor is noise. It's clear the noise level is better than in the 1D Mk IV or the 1DS III. The pixel size is larger than in the 1DS III or 5D Mark II (6.95 microns, versus 6.4) and the difference is even more striking compared to the 5.7 micron pixels in the 1D Mark IV. That helps us in terms of light capturing ability and increases the signal to noise ratio. In turn, that does nothing but help the dynamic range of the camera.'

The pixel size is 8.5% larger in the 1D X compared to 1Ds3 or 5Dm2.

Everything else being equal, how does that translate into real-world image quality improvement? (I accept there'll be other factors to consider other than pixel size)

EOS Bodies / Great call, CR guy
« on: October 17, 2011, 11:56:18 PM »
Fantastic call with the Oct 18th 1D announcement.... you sure got the biggest one of the year right.

That's for your many detractors out there!!!

Keep it up, Craig!

Out of curiosity and of my current struggles of working out the most efficient way of dealing with my rapidly accumulating photos, how much time/effort do people spend on post-processing in general?

I take family/toddler/travel photos purely as a hobbyist. I can see a huge difference in IQ of my 7D captured photos between in-camera jpg and RAW captures. So all I do is shoot in RAW, download to Aperture, do the occasional exposure adjustment, and that's it. I then export to jpg as required. Can't imagine doing the multitude of adjustments that are possible with Aperture, let alone more sophisticated software like Photoshop, LR, DxO etc. I know you can run macro changes to batch of photos. That's still a lot of post-processing time, if you consider I typically take 2000 photos on a 2 week vacation.

I accept that it's difficult to generalise these things, but how much post-processing do you do, either in terms of time, or number of steps? What would you realistically do for a batch of 2000 personal travel/holiday photos which would include a mixture of indoors/outdoors, people/landscape/architecture, all shot in RAW?

Software & Accessories / Rain / water spray cover for Canon 450D/XSi?
« on: June 29, 2011, 01:03:58 PM »
Hello all,

Planning a trip on the Maid of the Mist at Niagara in 1-2 months - ride comes with a rain coat, so I'm expecting a lot of spray! What have you found to be useful 'housing' for this sort of thing?

I'll have with me a Canon XSi and probably with a 28-70mm f/2.8L lens. I found the OpTech Rainsleeve on Amazon for USD12 - have you used this? (


Lenses / Lens cap solution?
« on: May 05, 2011, 09:46:18 AM »
I have always found it somewhat annoying how easy it is to lose the lens caps on DSLR lenses. Why has Canon never come up with a way of ensuring the lens cap stays permanently attached to the lens?

What do you guys use, if anything, to overcome this little nuisance? I know Amazon has some cheap "lens cap keeper" solutions, but have never tried them.

EOS Bodies / "Discontinued" 5d Mark II ?
« on: May 02, 2011, 10:34:55 AM »
I called all the four Best Buy stores in my Michigan, USA area this morning. All said "discontinued" or "no longer available", and the system would not allow them to even place a back order. I know for a fact that one of these stores had a 5dmkII in stock in store about a month back.

Is this purely a sign of the recent quake affecting production in Japan, or is it a real indicator of an imminent announcement of a replacement?

Lenses / Lens filter: step-down adapter ring, or not?
« on: April 19, 2011, 10:32:08 PM »
Need your thoughts please...

On my two L lenses, I've currently got B&W 77mm UV filters with the occasional use of the 77mm circular polariser MRC. I've just ordered a 135mm f/2L, which would take a 72mm filter.

Should I:

1. Stick with 72mm filters (for those who agree these are useful!), i.e. buy a new filter, or

2. Get a step-down 77-72mm adapter ring (B&W has them - amazon, for an inviting $19.95). Whilst it may not be a good idea and I can imagine it would be incredibly annoying to repeatedly swap UV filters between lenses and leave a lens or 2 without a filter permanently attached (do most people always leave a filter on every lens anyway?), it would make sense to have an adapter for more infrequently used filters, i.e. in my case the circular polariser MRC filter. At over $150+ a pop, I'm not sure I want/need 77mm AND 72mm ones! So the adapter would get round that cost issue.

Suggestions very gratefully received!

Software & Accessories / Insurance - travel within and outside USA
« on: April 14, 2011, 09:44:20 AM »
Hello all,

I recall reading a post about insurance for camera equipment some time ago, although can't seem to find it.

Any recommendations for insurance for camera equipment for:
1. Travel from USA to Europe
2. General coverage within the USA (i.e. anywhere outside my home in Michigan). My home insurance doesn't cover damage outside the home (I believe places like the UK have this).

And any comments that includes how easy / difficult it was to claim any loss / damage would be appreciated too.


Lenses / Old film camera lenses for DSLRs?
« on: April 04, 2011, 10:41:39 PM »
First off, I'd just like to say that I'm reasonably new to this thoroughly enjoyable and informative site, particularly the forums.

My question is about whether old "vintage" lenses used on film bodies can be used on canon DSLRs?

I got my first L lens just 4 months back (24-70mm), and it's been a point of no return! Or at least I thought so... A buddy of mine has a Nikon D90 (bear with me, I know this isn't a Nikon forum), and got a new 50mm f/1.8 (released 2008 I think). He got his hands on a 30 year old 50mm f/1.8 in the past week and the optics just seems to blow the new one away (image quality, sharpness, colours), which is really quite a surprise to both of us. The drawback of course, is that this lens only has a manual focus function.

Would be very interested to hear whether this is feasible with canon DSLRs (I suspect not, although I don't recall where I read this), and if so, whether it's worth the cost savings particularly with having to manually focus all the time (I shoot a lot of my mobile 2 year old kid). Otherwise, I plan to only get L lenses in the future.

Thanks for your feedback!

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