Greg VdB

Greg VdB

Lives in Earth
Works as a Geoscientist
Has a website at www.pbase.com/gbleek
Joined on Sep 6, 2002

Comments

Total: 261, showing: 1 – 20
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Seems like an amazing piece of kit for the money. With manual aperture, macro, and tilt, this looks like it could be an instant classic for timelapse purposes! The f/4 maximum aperture limits it somewhat for astro(-timelapse) work, but with sensors getting ever better, this limitation isn't that great either. Very eager to see it's astigmatism performance in that sense... And flare against bright light. Anyway, from the "reviews" so far, to me this looks like a grown-up lensbaby.

Direct link | Posted on Jun 24, 2015 at 02:46 UTC as 26th comment
On Nikon D7200 Review preview (522 comments in total)
In reply to:

Zdman: No electronic first curtain. When you want to do some detail macro (an possibly telephoto work) this becomes a issue. It would be a software fix as the sensor is fully capable. Should be listed as a con as most of its competitors have it.

Robert, you must have missed the part where Zdman rightfully noted that "most of its competitors have it"... and that means competitors in the same price range.

Direct link | Posted on Jun 4, 2015 at 09:40 UTC
On Nikon D7200 Review preview (522 comments in total)
In reply to:

Zdman: No electronic first curtain. When you want to do some detail macro (an possibly telephoto work) this becomes a issue. It would be a software fix as the sensor is fully capable. Should be listed as a con as most of its competitors have it.

That's indeed a crucial feature for some applications - I always use first curtain with my 70D for astrophotography.

Direct link | Posted on Jun 4, 2015 at 09:27 UTC

Per-pixel sharpness isn't very impressive :-)

Joking aside, I must say I'd happily spend two weeks shooting a panorama like that. Just being in such a landscape, with the time to drink it all in, is all the reason I'd need.

Direct link | Posted on Jun 2, 2015 at 19:57 UTC as 78th comment
In reply to:

nunatak: a nice lens, but there's something about the bokeh profile i find unsettling.

So Vincent, you're saying that nobody should EVER mention bokeh, but that you agree with us? ;-)

Anyway, I just noted that Lenstip has a full review online, and it shows the issue well at the bottom of this page
http://www.lenstip.com/431.7-Lens_review-Nikon_Nikkor_AF-S_300_mm_f_4E_PF_ED_VR_Coma__astigmatism_and_bokeh.html
Oddly the reviewer doesn't mention it, but at f/4 on FF the OOF highlight are clearly truncated towards the (vignetted) edges. It is worse on FF for this lens than it is for instance with an EF 50mm f/1.8 II on APS-C (compare the Lenstip reviews), and to give you an idea this is the result that combo delivers: http://www.pbase.com/gbleek/image/37881395

It will only ever show up on supposedly round OOF highlights, but since I can also see it in the grass background of the image above, I know it would bother me. Especially in a 2000$ lens... I guess that's the price to pay for portability.

Direct link | Posted on May 16, 2015 at 06:03 UTC
In reply to:

The Name is Bond: I'm surprised a the comments on the bokeh. I consider myself a bokeh nut (since 2007, so I have examined tens of thousands of pics specifically for bokeh) and apart from the swirliness I'm seeing good bokeh. Whatever fresnel artifacts there might be are well controlled and nothing to sway a decision against this lens.

Someone mentioned 'unsettling' bokeh but having been through all the pics I can't see what they are referring to. And there are none of the features one would expect to produce such an effect; quite the opposite. Transitions are smooth instead of hard, let alone any hard rings or nissen-bokeh (nervous) inducing double lines etc.

Bokeh is pleasingly smooth in general, but what some people are noticing is a vignetting-related "inconsistency" towards the edges. It only really shows up on supposedly round OOF highlights, and I've not seen a single test image that has a background that would show this well. Dan18 shows it to some extent, but in fact I also notice it in the grass of the image above.

If you and others don't believe it from the images you've seen: check the bottom of the page of the Lenstip review http://www.lenstip.com/431.7-Lens_review-Nikon_Nikkor_AF-S_300_mm_f_4E_PF_ED_VR_Coma__astigmatism_and_bokeh.html
Oddly the reviewer doesn't mention it, but at f/4 on FF the OOF highlight are clearly truncated towards the vignetted edges. It is worse on FF than it is for instance with an EF 50mm f/1.8 II on APS-C (compare the Lenstip reviews), and to give you an idea this is the result that combo delivers: http://www.pbase.com/gbleek/image/37881395

For people who don't mind, it looks like a great lens.

Direct link | Posted on May 16, 2015 at 05:56 UTC
In reply to:

nunatak: a nice lens, but there's something about the bokeh profile i find unsettling.

I was gonna comment exactly the same. Although good sample shots lack (best seen in Dan18), it seems like OOF highlights get seriously truncated towards the corners (due to vignetting?).

@DPR: it would be great if you could get some sample shots of the city at night whith OOF highlights...

Otherwise looks like a nice lens indeed. Also, WH16 is not only a great shot, but shows perfectly how thin DOF can be on FF at 300mm f/4.

Direct link | Posted on May 13, 2015 at 07:25 UTC
On Canon announces 50mm F1.8 STM lens article (310 comments in total)
In reply to:

Greg VdB: If the new 7-bladed aperture means an improvement on bokeh (look her for instance how "special" the old one is: http://www.pbase.com/gbleek/image/37881395), I fully intend to buy one. The improved focus ring should now make it a viable option for astrophotography.

Thanks for the heads up, RMOB, good to know!

Direct link | Posted on May 11, 2015 at 12:44 UTC
On Canon announces 50mm F1.8 STM lens article (310 comments in total)
In reply to:

Greg VdB: If the new 7-bladed aperture means an improvement on bokeh (look her for instance how "special" the old one is: http://www.pbase.com/gbleek/image/37881395), I fully intend to buy one. The improved focus ring should now make it a viable option for astrophotography.

You were all right about the number of aperture blades wide open, I concur - reading the lenstip review again it's rather the high amount of vignetting that truncates OOF highlights wide-open:
http://www.lenstip.com/424.7-Lens_review-Canon_EF_50_mm_f_1.8_II_Coma__astigmatism_and_bokeh.html
That said, the 7-blade aperture should hopefully improve bokeh at smaller apertures for regular photography.

As for astrophotography: I use non-hard stop lenses all the time using the 10x liveview image. No problem at all with my Tokina 11-16mm, Sigma 50-150mm and Sigma 400mm. However, with the Canon 50mm mkII it's nearly impossible to find good focus (on stars, mind you!) because of how 'loose' the focus ring operates. Oh, and as Dr_Jon said, a hard stop is not nearly accurate enough for the present day imaging sensors.

Direct link | Posted on May 11, 2015 at 11:43 UTC
On Canon announces 50mm F1.8 STM lens article (310 comments in total)
In reply to:

CaMeRa QuEsT: Priced same as the old all plastic body nifty fifty, it's really a no brainer here. STM, metal mount, 7 blade iris, much higher quality finish, same MFT charts, what's to hate? Oh yeah: the fact that it just made my very own 1 year old plastic nifty fifty worth absolutely nothing! Way to go Yongnuo! I have only you to thank for evaporating my hard earned eighty bucks! People, let's not kid ouselves: Yongnuo is the only reason why Canon is so gracious to gift us with such a high quality new lens at the same price as the now very shitty looking EF 50mm f/1.8 II.

Most people will not yet have heard the news, so quickly put your old one on ebay ;-)

Direct link | Posted on May 11, 2015 at 06:38 UTC
On Canon announces 50mm F1.8 STM lens article (310 comments in total)

If the new 7-bladed aperture means an improvement on bokeh (look her for instance how "special" the old one is: http://www.pbase.com/gbleek/image/37881395), I fully intend to buy one. The improved focus ring should now make it a viable option for astrophotography.

Direct link | Posted on May 11, 2015 at 06:36 UTC as 53rd comment | 9 replies
On Canon EOS 5DS R added to studio test scene comparison article (518 comments in total)

Recommendation for pixel peepers: put it on "print size" and investigate how much difference you really see with your preferred camera... Personally, I'm quite comfortable in the comparison to my feeble Eos 70D, especially since I realize they are entirely different tools for different needs.

That said... Let the pixel peeping war commence!

Direct link | Posted on May 6, 2015 at 12:10 UTC as 96th comment | 3 replies

Reminds me of the time I saw two of those trying to escape from a basement in Prague... http://www.pbase.com/gbleek/image/75157707

Direct link | Posted on May 3, 2015 at 12:02 UTC as 82nd comment
In reply to:

Greg VdB: I'd really like to know if I could use my Sigma 400mm f/5.6 HSM APO Macro on a M4/3 body like this. Though optically brilliant, it's an older lens that doesn't work on newer Canon dslr bodies, and to have it working on a potentially sensor-stabilized body would be great. How usable it would be for sports/wildlife depends of course on how fast and accurate focus would be.

Thank you both for your insights, Neil and Hibertus. Sadly, Sigma quickly stopped re-chipping incompatible lenses, before I bought my 400mm second-handed. At the time that was ok since I had a 20D where it still works on, but obviously that camera is a bit dated now... Some people on a German forum managed to re-chip it by themselves, but last I read was that the not-so-easy hack stopped working for the newest (70D and younger) generation of Canon dslr's. I guess at some point I'll just have to buy a new tele prime...

Direct link | Posted on Apr 26, 2015 at 09:42 UTC
In reply to:

Jakub Kubica: Whole "play memories" experience is c*appy at best, free apps should be available for download without stupid account.

On Google's Playstore you can download free apps perfectly well without an account...

Direct link | Posted on Apr 26, 2015 at 09:29 UTC
On Hands-on with the Pentax K-3 II article (521 comments in total)
In reply to:

TriezeA72: Nice lines and angles, its a very hansome looking camera, I wish other companys would follow suit instead of making cameras that look like balloon twisting sculptures

Rich, have you ever visited Japan? Allmost all cars there are square bricks - exactly the opposite of the Japanese cars you can buy in the US or (slightly less so) Europe. Can't really complain about the Japanese when all they do is adapt to the local norms ;-)

Direct link | Posted on Apr 23, 2015 at 01:24 UTC

I'd really like to know if I could use my Sigma 400mm f/5.6 HSM APO Macro on a M4/3 body like this. Though optically brilliant, it's an older lens that doesn't work on newer Canon dslr bodies, and to have it working on a potentially sensor-stabilized body would be great. How usable it would be for sports/wildlife depends of course on how fast and accurate focus would be.

Direct link | Posted on Apr 23, 2015 at 01:18 UTC as 17th comment | 4 replies
On Red introduces 'Weapon' camera with 8K sensor option article (104 comments in total)
In reply to:

Matewka: I wanted to say something smart and intelligent and funny at the same time but all I can say is...

Wow!

How about the following scene at an airport security checkpoint:
"What is that in your backpack, sir?"
"Oh, just my Weapon"

Direct link | Posted on Apr 13, 2015 at 20:06 UTC
On Fujifilm X100T Review preview (666 comments in total)

I'd love to buy one of these for my parents for nostalgic reasons alone. They used a very similarly looking 35mm camera throughout the 80's, 90's and naughts that captured all our family holidays and parties. It too had a 35mm f/2 lens. Since four years they use a Nikon travel zoom P&S instead, but I'm sure they'd appreciate the feel of the X100T more. However, they'd definitely miss the zoom. Also: at 1100+ Euro this is by no means a cheap back-up camera. I'm absolutely certain my parents only payed a fraction for the "equivalent" product in the film era...

Direct link | Posted on Mar 25, 2015 at 09:09 UTC as 129th comment
In reply to:

Greg VdB: The "low-profile" thing is just a marketing tool. These days, everybody runs around with all kinds of bags containing smartphones, tablets, phablets, notebooks, and what have you not. The bags portrayed above could contain ANY of these, and pickpockets are really not going to pass on a good opportunity to steal an unattended bag just because it doesn't scream "photo-bag"! Just stay vigilent in crowds, and if possible avoid areas with higher crime rates...

Any stylish bag making you look like a reasonably wealthy person going to work defines you as a viable target. Wether or not you indeed do get targeted will depend much more on your diligence (/the chance that the offender gets away unnoticed) than on the type of bag you're carrying...

Direct link | Posted on Mar 13, 2015 at 12:32 UTC
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