mgrum

mgrum

Lives in United Kingdom United Kingdom
Joined on Jan 14, 2009

Comments

Total: 189, showing: 1 – 20
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In reply to:

Boss of Sony: Would this lens be good for photographing birds in flight? I'm thinking the wider angle will enable me to photograph birds with a larger wing span?

I got a great photo of a bird in flight with the Canon 10-22mm at 10mm once. Completely by accident, was shooting a seascape when a seagull flew right in front of the camera...

Direct link | Posted on Mar 24, 2015 at 15:32 UTC

"A lower-cost full-frame DSLR with a sensor approaching the same resolution as the 645Z that can accept 645 lenses (via an adapter, and with a crop factor) might well prove appealing to a certain constituency of these users."

There is no "crop factor" when using medium format lenses on a full-frame DSLR with an adapter. Stick a 35mm 645 lens on a DSLR and you will get exactly the same field of view as a native 35mm lens.

Direct link | Posted on Mar 9, 2015 at 11:25 UTC as 30th comment | 1 reply
On Sony Alpha 7S Review preview (467 comments in total)
In reply to:

mpgxsvcd: Wow, Rishi! What a very thorough review. The dynamic range data was very intriguing and not at all what I would have expected. Great job uncovering that.

I still like the A7s because its video capabilities are outstanding. However, I have a lot more respect for the A7r now after this review.

I know you didn't claim to discover it Rishi, that part was addressed to mpgxsvcd who suggested you had. Also I wouldn't say what I wrote was a "slap in the face", it was criticism, you could go as far as to say it was constructive criticism as I explained what I thought was wrong and even suggested an alternative ;)

It was a really good review, it just would have been that much more awesome last year.

Direct link | Posted on Mar 6, 2015 at 14:12 UTC
In reply to:

paul simon king: I have never got over the names Zeiss uses: "Distagon' sounds like some primary school nomenclaure - and just has me making up comic alternatives in my head: "distawent', 'wideolux', 'scopizoomitoff', 'yondergon', splenomegaly - oh no sorry don't know how that last one crept in there
;)

Zeiss terms refer to the optical design, whereas Leica terms just reflect the maximum aperture, which is already part of the lens name: "Oh the 50mm f/2 Summicron is an f/2"!

"The Zeiss 55mm f/1.4 is a Distagon, that's an unusual design for a lens of that focal length, I know something more about it now".

Direct link | Posted on Mar 6, 2015 at 13:40 UTC
In reply to:

dcolak: My NEX7 paired with SEL 50mm f1.8 or Sigma 60mm gives MUCH BETTER images. Sharper, less CA, nicer colors.

What´s going on here?

And why does high ISO image of FF A7II look no better than those I get from my NEX7?

Isn't FF supposed to be much much better than APS-C?!

What's going on is you're comparing an ultrafast wideangle lens to a short telephoto.

Full frame is 1.6 times better than APS-C. In each direction.

Direct link | Posted on Mar 6, 2015 at 12:33 UTC
In reply to:

paul simon king: I have never got over the names Zeiss uses: "Distagon' sounds like some primary school nomenclaure - and just has me making up comic alternatives in my head: "distawent', 'wideolux', 'scopizoomitoff', 'yondergon', splenomegaly - oh no sorry don't know how that last one crept in there
;)

"Distagon" is a portmanteau of the words "distance" and "gonia" which is Greek for "angle". "Angle" emphasises the wide angle of view and "distance" refers to the backfocus distance, which is greater for Distagon designs (which are all retrofocal) than for example the symmetrical Biogon designs.

There is some consistency with the naming schemes, all of the names with suffix "gon" are generally wide angle designs, Distagon, Hypergon, Hologon, Biogon.

Direct link | Posted on Mar 6, 2015 at 12:21 UTC
In reply to:

cgarrard: Might be nice to see a few budget primes for this lineup too, get people into the system with less outlay.

An aggressive announcement regardless, and showing strength for the FE system.

brendon, you've hit the nail on the head there, interchangable lens sales are dropping, it's easier to get a return on the high end stuff as the margins are much greater.

Direct link | Posted on Mar 5, 2015 at 15:58 UTC
In reply to:

cgarrard: Might be nice to see a few budget primes for this lineup too, get people into the system with less outlay.

An aggressive announcement regardless, and showing strength for the FE system.

Budget lenses in the $100-300 range don't make a whole lot of sense if you don't have a budget body to put them on.

Direct link | Posted on Mar 5, 2015 at 10:00 UTC

Prices are very high for the new lenses, that is for sure.

It seems Sony have gone all out for quality in the first round of lenses (which necessitates a large lens if you want to extract the most from a 36+MP sensor). That is to be praised I guess as others tend to do it the other way round and bring out the good lenses after you've bought the budget options.

Hopefully the next round of lenses will include one quality wide prime, and some more affordable Sony (non-G) 24mm, 50mm 85mm or 100mm lenses.

Direct link | Posted on Mar 4, 2015 at 09:40 UTC as 53rd comment | 2 replies
In reply to:

RaghavBaijal: The new 90mm Macro has "Direct Drive SSM focusing system"

I though these type of AF Motors were not compatible with On Sensor PDAF or Contrast Detect systems. Ever tried using A Mount SSM Lenses on E Mount cameras with LAEA 1/3 adapters? Its quite slow & unusable. Even Canon has to use STM Motors for their Dual Pixel AF System.

If this kind of tech works flawlessly on E Mount cameras, then Sony should seriously consider updating all A Mount Tele & Large Aperture Lenses with these Motors so that they are compatible with just an "Extension Tube" type adapter (which is what the LAEA 1/3 adapters are really).

I would really love to use the 55-300 A Mount lens on the A6000. I am sure folks would love to use the 70-300 GII or 70-200 2.8 GII on A7x series cameras. IBIS is already technically possible & will eventually make it into all E Mount cameras.

It's a "Direct Drive" SSM, which is very different from the ring type SSMs found in SLR lenses. I don't really know the details but it's claimed to give the same type of performance characteristics as a stepper motor which makes it very good for contrast detect AF systems.

I can't find a clear explanation of how it works, but there's a video from Sony which gives the general concept:

https://www.youtube.com/watch?v=btAPqKf_Au0

Direct link | Posted on Mar 4, 2015 at 09:35 UTC
In reply to:

cgarrard: Might be nice to see a few budget primes for this lineup too, get people into the system with less outlay.

An aggressive announcement regardless, and showing strength for the FE system.

straylightrun: a few *more* budget primes, then.

Direct link | Posted on Mar 4, 2015 at 09:24 UTC
In reply to:

lighthunter80: For $1,600 the 35/1.4 has to be better than any other 35 fr9m Canikon or Sigma.

The 28/2.0 seems to be priced fair.

I expect it will be. The Sigma will always offer a better value proposition, though.

Direct link | Posted on Mar 4, 2015 at 09:13 UTC
In reply to:

J A C S: "This new ZEISS® Distagon T* FE 35mm F1.4 ZA full-frame wide angle prime showcases legendary ZEISS® optical performance in a compact design. "

LOL! It is larger than the Canon, Sigma and the Nikon.

It's more compact measured from the film plane to the front the lens than the Sigma and Nikon, and the Canon too (very marginally).

But that press release is pure marketing, ignore it and just read the specs while waiting for the independent test results. It's the same as when Canon claim their sensors capture images with "wide dynamic range" in each new camera press release.

Direct link | Posted on Mar 4, 2015 at 09:06 UTC
On Sony Alpha 7S Review preview (467 comments in total)
In reply to:

mpgxsvcd: Wow, Rishi! What a very thorough review. The dynamic range data was very intriguing and not at all what I would have expected. Great job uncovering that.

I still like the A7s because its video capabilities are outstanding. However, I have a lot more respect for the A7r now after this review.

mpgxsvcd:

"I imagine that you are in the minority if you don’t appreciate the time and effort it took"

I'm not sure how you got that from what I wrote:

"I really appreciate the thoroughness of reviews on DPR".

However, you do have to question the priorities when a review site takes 11 months from announcement to review (especially with Sony, who replaced the A7 scarcely a year after it's release).

A better space analogy/comparison would be the Chinese Yutu rover, which is returning by far the most detailed, highest resolution images and scientific data ever from the surface of the moon, but some 50 years later.

Direct link | Posted on Mar 3, 2015 at 15:45 UTC

It had better be a gas pipeline as this thing is 100% vapor.

Direct link | Posted on Mar 3, 2015 at 10:37 UTC as 7th comment
On Sony Alpha 7S Review preview (467 comments in total)
In reply to:

mpgxsvcd: Wow, Rishi! What a very thorough review. The dynamic range data was very intriguing and not at all what I would have expected. Great job uncovering that.

I still like the A7s because its video capabilities are outstanding. However, I have a lot more respect for the A7r now after this review.

Rishi:

There's a big difference between providing an example of something and "uncovering" something. I could provide you a great example of Newton's Law of Universal Gravitation (much better than the rather opaque equations and graphs in the Principia) but I'm not going to claim I uncovered it.

Incidentally I was trying to decide between the A7R and A7s all those months ago, and the final thing that swayed me was the DR comparison on DXO, I can imagine what 1 stop difference in SNR is like I don't need to see a picture.

I really appreciate the thoroughness of reviews on DPR, but I only end up reading the ones for cameras I have no intention to buy, anything I'm seriously interested in I would have bought, (and sold) long before the review comes out. I do wonder if the balance between depth, and time to write the review is quite in the right place.

Direct link | Posted on Mar 3, 2015 at 09:01 UTC
On Sony Alpha 7S Review preview (467 comments in total)
In reply to:

mpgxsvcd: Wow, Rishi! What a very thorough review. The dynamic range data was very intriguing and not at all what I would have expected. Great job uncovering that.

I still like the A7s because its video capabilities are outstanding. However, I have a lot more respect for the A7r now after this review.

The dynamic range figures have been around since DXO Mark reviewed the camera way back in July last year, so it's been known for 8 months, not really "uncovered" by this review...

Direct link | Posted on Mar 2, 2015 at 18:11 UTC
In reply to:

mpgxsvcd: Wow that looks like a stunner. However, I can't help but think that a Panasonic GH4 in capable hands with the right lenses could probably come close to matching it.

$28,000 to spend on lenses goes a really long way towards making the playing field even for the GH4.

You can do almost anything with almost any equipment but it's usually easier/less risky with the high end stuff that's designed for the job.

Direct link | Posted on Feb 24, 2015 at 10:00 UTC
In reply to:

davids8560: I don't doubt that this camera takes a pretty good photo, but I really wonder nowadays about build quality and reliability when it comes to Sony products. Too many Sony products have given me grief after even sometimes less than a year of use, including my pricey NEX-7. And Sony's customer service is even more clunky than its online manuals and the menu systems of many of its cameras. Makes me apprehensive. And I think long-established camera makers still have the edge when it comes to IQ and image processing, for the most part. They know what to do with Sony's better sensors than Sony does, and I think most people know this. Panasonic has great hardware and iffy IQ, Sony has great sensors but iffy hardware. YMMV of course.

There's a certain long-established camera maker that's quite a long way behind the curve when it comes to IQ...

Direct link | Posted on Feb 18, 2015 at 16:35 UTC
In reply to:

ljmac: And this is why full frame mirrorless is utterly pointless - the lenses still have to be huge.

J A C S, yes I 'm aware of the Canon 40/2.8, a very rare pancake lens, and whilst it's very good value, the Zeiss 35mm f/2.8 is sharper wide open than the Canon 40 ever gets at any aperture. That an optically superior lens is more expensive (by a considerable margin) should surprise no-one.

Direct link | Posted on Feb 16, 2015 at 17:21 UTC
Total: 189, showing: 1 – 20
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