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Messages - rs

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181
PowerShot / Re: Updated PowerShot G1 X II Specs
« on: February 11, 2014, 01:48:10 AM »
More photos:

http://photorumors.com/2014/02/11/more-leaked-pictures-of-the-canon-powershot-g1-x-mark-ii-camera/#more-54870

Much clearer, they match the previous image, but there's still something that doesn't look right about them.

If this is to be believed, the 12.5-62.5/2.0-3.9 lens hints at a 1.9x crop sensor, slightly smaller than the 1.85x crop from the mk I of this camera.

182
PowerShot / Re: Updated PowerShot G1 X II Specs
« on: February 10, 2014, 01:13:21 PM »
Hi,
    NFC = Near field communication??

    Hmm... If I remember correctly, Canon had a patent sometime ago on communicating the lens with the camera body wirelessly. Hmm... may be Canon are testing out the technology on this model?? May be the camera body will communicate with the lens and EVF wirelessly using NFC?? But NFC communication is quite slow right?? Just wonder??

    Have a nice day.
NFC is commonly used as a protocol to initiate more capable communication channels such as WiFi. This particular camera is rumoured to have a built in lens, so no reason to replace hardwired connections with wireless. Also, what's the point of removing some of the electronic contacts on a lens mount? You can't remove them all without putting batteries in the lens, so what's the point? And what's the problem with electronic contacts within the mount in the first place?

NFC wouldn't have sufficient throughput for a viewfinder. EVF's in their current guise have many issues which make them inferior to OVF's, and lag is certainly high up that list. Any form of additional delay such as that introduced by even the fastest WiFi connection is a big problem. A physical connector is by far the best method. Besides, who wants to have a camera where is constantly says 'Connecting', and then needs lots of menu options and power cycles before you can finally grab the shot? I thought that was what the Sony QX100 was for  ;)

183
PowerShot / Re: Updated PowerShot G1 X II Specs
« on: February 10, 2014, 12:09:08 PM »
Is the EVF only for the G1X2?

Sounds like an interesting addition to DSLR as well...
Every hotshoe mounted EVF from other manufacturers I'm aware of so far* has used an extra port/connector for the data throughput, usually below the hotshoe. I doubt anything like this could be retrofitted to any existing products without the port/connector.

* someone is bound to prove me wrong on this  ::)

184
EOS Bodies / Re: Patent: Canon EF 24-85 f/3.5-5.6 IS
« on: February 10, 2014, 03:01:04 AM »
So that would spell the end of the 24-105.
Example 3 on this patent is quite likely the end of the 24-105.

185
EOS Bodies / Re: Patent: Canon EF 24-85 f/3.5-5.6 IS
« on: February 10, 2014, 01:10:36 AM »
Makes sense, with full frame sensors moving down the line, Canon needs to reinvent the entry level full frame standard zoom. FWIW the EF 28-135mm f/3.5-5.6 IS USM is no longer listed on the Canon Europe website.
+1

While this lens isn't for me or most of the people who read this site, Canon sell a huge number of rebels with kit lenses. This is merely a FF kit lens, hopefully with a price tag, size and weight to match. Just look at the myriad of 28-80 and 28-90 kit zooms that Canon used to make to get an idea of what this lens could represent.

Let's hope that the intention of this patent at least means the the intention to make a FF rebel and/or SL1/100D to compliment this lens - not now, but a couple of years down the line when FF sensor prices drop further  ;)

186
Canon General / Re: Canon PowerShot G1 X II Image
« on: February 09, 2014, 11:20:33 AM »
Camera may be real, but photo is clearly a fake. Front zoom ring ends in midair on in the case. Does not complete the full circle!
Good catch! Welcome to the forum :)
Likewise, welcome to the forum vrf.

Although Keith from Northlight Images did point this out a good 14 hours earlier:

Open the image in PS, lighten the shadows and all kinds of oddities show up around the lens, such as a zoom ring that stops and fades into the grip

Why has this been debated so long without anyone looking at the actual photo, or has the huge EVF done its job and distracted everyone's attention ;-)

I've a rollover image showing the issues at:
http://www.northlight-images.co.uk/cameras/mirrorless.html

Not that I wouldn't welcome a decent (big) EVF for an EOS-M one day...

187
Canon General / Re: Canon PowerShot G1 X II Image
« on: February 08, 2014, 05:24:26 AM »
Very interesting, that silver ring near the body strangely looks like a metal lens mount...

Canon's answer to the Nikon 1?

Like I said, it looks like this will have interchangeable lenses  ;D ;D ;D

There's a lot that's very carefully excluded from this image, either by the framing (which hides any possible lens release), or in the case of the writing on the pop up flash, selective blurring.

However, what is clear from the photo is this does share a very close family resemblance of the S series rather than the G series. Both in terms of styling and controls. That makes at least one of those rings around the lens likely to be a control wheel. Like the S series, there is a zoom rocker around the shutter button - this makes the likelihood of it being an interchangeable lens camera very small.

The lens looks far too big for a 5x zoom on a small sensor, so hopefully it's G1X size minimum, or even full APS-C size. Will they put the 70D sensor straight into an S series body?

One thing that is hinted at in the photo which I've just seen is a tilting screen. It's not just sticking out proud at the back, but its at an angle.

188
Canon General / Re: Canon PowerShot G1 X II Image
« on: February 07, 2014, 05:02:42 PM »
no flash? and no flash + EVF?  :-\ come on... that's sad!  :-X
To me it looks like a built in pop up flash, much like the S120. On the right of the EVF there's a rectangular cut out, and below on the side there's a flash logo - that looks like it's next to a physical release switch to make the flash pop up. No more messing about with multiple button presses and looking at the screen to get the flash to work

189
Lenses / Re: Sigma 50mm f/1.4 Art Price leaked
« on: February 07, 2014, 03:53:26 PM »
Just to re-iterate my point, that price is just a guess to allow for pre orders. Much like this other Australian retailers guess:

http://www.dirtcheapcameras.com.au/digital-camera-lenses/slr-lenses-by-brand/sigma-lenses/sigma-50mm-f-1-4-dg-hsm-art-lens-for-canon-mount.html

$899

899 is good price.  However, I feel that 35mm is more useful for me.

Except 899 is just another wild guess made by a retailer to allow for pre-orders to be taken. Unless one of the retailers is incredibly good at guessing, neither price is representative of the RRP. Wait until Sigma announce the price before making any judgement.

190
Lenses / Re: Sigma 50mm f/1.4 Art Price leaked
« on: February 07, 2014, 08:59:38 AM »
It does say 'Pricing listed is anticipated only, where final price and ETA are to be announced'. This is nothing more than a placeholder to allow people to place preorders with them.

Just to re-iterate my point, that price is just a guess to allow for pre orders. Much like this other Australian retailers guess:

http://www.dirtcheapcameras.com.au/digital-camera-lenses/slr-lenses-by-brand/sigma-lenses/sigma-50mm-f-1-4-dg-hsm-art-lens-for-canon-mount.html

$899

191
Lenses / Re: Lens Announcement Coming in February? [CR1]
« on: February 07, 2014, 06:47:06 AM »
It's also about time we had a Canon 1.4x and 2.0x extender that retained AF past f5.6/8.0 - I'm sure it's a marketing ploy rather than technical - or at least extend the f8.0 AF capability to the recent batch of midrange cameras  - 6D & 70D with a disclaimer
It's not the extender which stops AF from functioning. It's not the lens. It's the combination of the two which creates the resulting maximum aperture, and that's either inside or outside of the range of the AF system built into the body.

No-one creates a 1.4x converter which doesn't result in a focal length 1.4x longer and an aperture one whole stop slower.

And similarly speaking, no-one makes a 2x converter which doesn't result a focal length 2x longer and two whole stops slower than the native lens.

The only workaround to keep AF working (and without bodges) is to make sure you've got the maximum aperture of the combined lens/TC within the AF limits of the body.

Phase detect AF works by comparing the two phases (halves/sides) of the lens when looking at an object - exactly like a split prism focus screen. If the aperture is too small, those off angles required aren't supplied by the lens, so the split prism goes black (or the AF module gets no light). It's as simple as that.

There is usually a small margin in there, so there will be a software limit slightly before the hardware limit; this is simply the manufacturers way of producing a product where people don't get bad AF experiences.

For instance, the old taping the contacts trick to fool the max aperture, or use a 2x and a 1.4x to get incorrect reporting (or even a zoom which reaches f6.3 at the long end) all trick the AF system into thinking it's got a lens within its limits, so AF functions.

I've tried a 70-200/2.8 with a 2x and 1.4x on a 40D - f8 lens on a body which should only AF up to f5.6 - AF operated, but it hunted all over the place without locking on. I did occasionally manage to get something out of it by manually focusing and then letting AF take over once I'd done all the hard work, but even then it had about a 90% failure rate.

192
Lenses / Re: Sigma 50mm f/1.4 Art Price leaked
« on: February 06, 2014, 05:08:45 PM »
It does say 'Pricing listed is anticipated only, where final price and ETA are to be announced'. This is nothing more than a placeholder to allow people to place preorders with them.

193
Canon General / Re: Patent: EF-S 17-55 f/3.5-5.6 IS STM
« on: February 05, 2014, 12:54:29 AM »
Mathematically, example 3 at 17.5mm (wide) should be rounded up to 18mm, not down to 17. If this lens ever does make the day of light, I suspect both the engineers and marketing department would be in favour of calling it an 18-55 lens.

194
Sports / Re: Your favourite motorsports events
« on: February 02, 2014, 02:22:11 PM »
It could make sense that the front have high camber bu tlook straigth from perspective while the back look like they have positive camber while they don't... Had'nt tought it out like that. Thanks.  Nice photo by the way.

Thanks, but it was just the result a Google image search for a Lotus F1 car  ::) My only F1 photos were taken in KL back when I had a Panasonic FZ7. They didn't come out like that!

195
Sports / Re: Your favourite motorsports events
« on: February 02, 2014, 06:02:45 AM »
That lotus appears to have a lot of rear wheel positive camber, this seems bizarre to me. May be its just a rendered model perspective thing though.
The camber is usually opposite to this, so I think it's just the overhead image giving off that impression.  I’m sad to see that their not at Jerez this week, but I’m glad that their Ex-principal has seen the light and joined McLaren!!!!!  We had the fastest car yesterday by 6 tenths, so I’m keeping my fingers crossed for a successful year this year, last year was the worst season we’ve had since 1980 so it can't get any worse....... :-\

I know it should be the other way around, but since the front wheels do not show weird camber, it seemed not to be a perspective thing... that's why it struck me.
F1 cars have wider rims/tyres at the rear than the front, due to all the power going through them. Therefore, to get the same level of cornering force from each axle, the rear doesn't require the same quantity of negative camber. This also doubles up as a handy way of squaring off the tyre angles for putting the power down on the straights.



Therefore it is a perspective thing.

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