April 18, 2014, 11:48:40 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - traveller

Pages: 1 2 3 [4] 5 6 ... 42
Lenses / Re: 24-70 f/2.8 L II front coating peeling off?
« on: February 04, 2014, 11:38:48 AM »
It's certaily possible for the coatings to become damaged or to delaminate.  If the outer protective layer(s) are damaged (by physical impact like an object hitting the front element or a scratch caused by larger particulates on the lens when it's rubbed with a cleaming cloth), moisture can penetrate the layers of coatings, and some of the antireflective layers are quite susceptible to moisture damage (not even water on the lens - humidity is enough).  Use of inappropraite cleaning solution can damage coatings, even Scotch tape can cause microscopic lesions of the surface.

Possible explanation, but it was quite widespread over the front element (sorry, I didn't think to take a photo at the time). At first, I thought it was just moisture, but it wouldn't rub off; it also didn't look like your usual scratches: they weren't thin lines, but fat and speckled. It's strange because it's his newest lens (less than a year old) and none of the others are in this sort of state, despite similar usage.

UPDATE: I've just had a 'phone call from him (whilst typing this); Canon are blaming this on "excessive cleaning". The lens is just over 12 months old and apparently been cleaned with only a microfibre lens cloth... Time to buy UV filters for my lenses? Oh rats, the good ones are multi-coated too!!!  :o

Lenses / 24-70 f/2.8 L II front coating peeling off?
« on: February 04, 2014, 08:38:15 AM »
I have a friend whose 24-70 f/2.8 L II is currently with Canon, as the front coating appears to be separating from the glass of the front element. Has anyone else experienced anything like this with any of their lenses and if so, how did Canon respond?

Lenses / Re: How many radioactive lenses do you own?
« on: February 03, 2014, 01:36:57 PM »
Apparently, my M42 mount SMC Takumar 55mm f/1.8 is radioactive...  :o

Lenses / Photozone's review of the Sigma 24-105 f/4 Art is online
« on: February 02, 2014, 02:47:22 PM »
Pretty similar to the Canon 24-105 L, but with better centre resolution...

EDIT: Sorry, forgot to post the link -how rude of me!


PowerShot / Re: Canon PowerShot G1 X Successor Coming Shortly [CR2]
« on: February 02, 2014, 02:28:30 PM »
And if it features another slow zoom lens and tiny optical viewfinder, it will be equally unexciting.

EOS Bodies / Re: Patent: Canon Curved Aperture Diaphragm
« on: January 27, 2014, 04:58:52 PM »
So one of the Canon engineers was playing around with his wife's steamer basket and thought "ah ha!"...  :D

EOS Bodies / Re: Patent: Canon 11-24mm f/4 Lens
« on: January 25, 2014, 03:16:44 PM »
I find myself agreeing with Dilbert (God forbid  ;) ) on this one: fix the bread and butter lenses first before moving on to exotica.

EOS Bodies / Re: Canon EOS-A1 with Hybrid EVF? [CR1]
« on: December 21, 2013, 03:49:45 PM »
Seems to me that the 1D C is s bit crippled as a video camera without an EVF. A hybrid OVF/EVF would also be a great addition to a high mega pixel flagship stills camera, for critical focusing tasks.

EOS Bodies / Re: New EOS-1 Camera Information [CR1]
« on: December 20, 2013, 06:39:59 AM »
And there is is irony....the 1Dx was to unify the two 1D ranges...the 1DIII and 1DsIII into a single body and a single range....but the 1DX came out at the price point of the old 1Ds range....if the 1DX proves to be nothing more than a full frame 1D series...then how much will Canon charge for their 1Ds replacement? Silly money I guess...


Whether Canon were genuinely intending the 1D X to replace both digital 1-series lines, or whether this was just FUD whilst they developed a high-res sensor for a 1Ds MkIII replacement, the outcome will be the same! (assuming this rumour is correct). With the talk of a Pentax 645D MkII, I'm not sure that there's quite as much headroom above the 1D X as there otherwise might have been, nevertheless I think it's safe to assume at least a $£€1000 premium.

EOS Bodies / Re: New EOS-1 Camera Information [CR1]
« on: December 20, 2013, 03:49:36 AM »
Why are people always whining about megapixel counts and noise? Have they not heard about downsampling? The real tradeoff is between resolution and shooting speed, not noise. Your choice if this rumour come true is simple: want to print really big? Choose the 1D Xs; want to shoot really fast? Choose the 1D X.

Lenses / Re: DXOMark: Sigma 24-105 f/4 DG OS Reviewed
« on: December 18, 2013, 05:32:23 PM »
There's a lot of Sigma hate going on in this post. I can understand that quite a few people have been burned by third party lenses in the past, I've also had mixed results, but I think that's a reason to be careful with what you buy, not to dismiss an option outright. I don't currently own any Sigma lenses, but I had the 10-20mm f/4-5.6 before moving to full frame, I enjoyed using it very much and got good results. Unlike the argument that is often put forward, I don't think that non-Canon lenses necessarily have poorer resale values, so long as you buy decent quality lenses that appeal to the (often more savvy) second hand market; the hit that I took selling my Sigma was no worse in percentage terms than the hit I would have taken selling the Canon EF-S 10-22mm.

I currently own the Canon 24-105mm f/4L IS and while I am not in a hurry to rush out and buy this new Sigma to replace it, I am glad that people looking for a lens in this class now have another option (other than going for a 24-70 f/2.8 ). If the DXO Mark data is correct (and I am looking at the measurement data, not the silly "single number" metric), this Sigma looks quite a bit better wide open at the long end of the zoom range. This is great news, I'm often torn between the 24-105 and the 70-200 when I get to 70mm (maybe I need a second body, but I can't afford another 5D MkIII -the first one was painful enough on my bank balance!).

For those that absolutely will not countenance owning anything but Canon branded lenses, perhaps the appearance of this new 24-105 will motivate them to produce a 24-105 f/4L IS II...  ;) 

Third Party Manufacturers / Re: Sony has 54MP FF sensor next in line
« on: December 06, 2013, 06:06:12 AM »

What sort of IQ will it have?
Expect nothing worse than the current 24MP APS-C in Nkon/Sony but hopefully much better.

54MP only? ;D

Yeah, I know, not enough to better the current Phase One IQ backs for medium format. Shucks.

I don't know about that, there's meant to be a joint announcement with Hasselblad next year as well; could Hassie really be moving to a Sony manufactured CMOS sensor in their MF backs? If it were the same pixel density as this 54MP 35mm sensor, what would that be at 645 -nearly 140MP!!!

Whilst battery life is a bit of an Achilles Heel for any mirrorless camera (especially those with battery draining EVFs), anyone who's shooting 1200 shots per day probably needs a DSLR anyway.

I quite like the idea of a mirrorless full frame camera for landscapes, not just because the camera is smaller, but because wide angle lenses can be made so much smaller as well. The best thing about these Sonys is that you can try them out by just buying the camera and adaptor for your existing lenses.

I have a friend who is desperately looking for an upgrade to his 1Ds MkIII and doesn't do enough action work to make a 1D X an attractive option. He was seriously talking about the D800, but didn't want to shell out for new lenses. I suggested he take a look at the A7R with an EF-FE mount adaptor to start with. He wasn't keen because he's used to the 1D series body (he regards my 5D MkIII as too small -he's not much over 5' tall BTW!).  I pointed out that you wouldn't want to use it all day at an event with a 70-200 on, but (as LightandMotion ably demonstrates in his post) who cares when you've got it on a tripod?

EOS Bodies / Re: Two New Full Frame Cameras in 2014? [CR1]
« on: December 03, 2013, 01:13:26 PM »

This was my last favorite comment from this thread. I totally agree...Canon can take their time on the 5D IV and 1D neXt. Far too early to replace those cameras. I suspect the big camera Canon will be at least announcing next year will be the big megapixel camera...the 1Ds X or whatever then end up naming it. The landscape and studio photography camera.

Personally, I hope it gets the following (this would be my wish list for the 1Ds X):

  • 180nm sensor fab process, 60% Q.E.
  • 46mp (8350x5567) or 54mp (9000x6000)
  • 16-bit on-die parallel ADC (3e- flat read noise)
  • 15+ stops DR
  • ISO 52100
  • 1D X meter and AF system
  • 61pt AF unit
  • 5fps frame rate (FF), 7fps (APS-H cropped), 9fps (APS-C cropped)
  • Integrated intervalometer, 9999 max frame count, configurable inter-frame delay, configurable pre-start delay, manual mode or bulb mode support, bulb-ramping
  • Price not to exceed $6,999


Finally, we're back on topic (fingers crossed!).

I notice that there's a rumour over on SAR that Sony has a 54MP full frame sensor in the pipeline, but at the moment it's too expensive to produce.


There's probably some truth in this, as SAR is effectively an unofficial informal channel for Sony's marketing department! I wonder if they'll sell it to Nikon first for the rumoured (far higher price point) D4x? We may even see this sensor tech make it into the next generation of Hasselblads...http://www.sonyalpharumors.com/sr4-hasselblad-and-sony-to-make-a-joint-sensor-announcement/

Canon must be doing something similar; maybe they're having cost/yield issues as well?

Maybe Canon are starting to realise that the Western market is completely different to the Asian market. In North America and Europe, mirrorless cameras seem to be bought by photography enthusiast or professionals, either to complement existing DSLR systems that they own, or to replace them. They are therefore looking for much more capable systems than Asian consumers, who seem to favour compact size and consumer orientated  features.

The questions are whether Canon is interested in developing EOS-M as a more enthusiast and pro orientated system and if so, whether they have missed the boat. I cannot answer the first part of that question, but I still think that Canon are not too late to reposition EOS-M in the Western markets. They have a massive installed user base of EOS users; if they can make an EOS-M that worked just like their DSLRs and worked well with EF mount lenses via their adaptor, then I still think they could have a winning system. The main factors that put me off buying into another manufacturer system are the cognitive dissonance of learning a whole new interface and using it alongside my Canon DSLRs and the difficulty of using them as proper backup bodies without losing features.

Pages: 1 2 3 [4] 5 6 ... 42