photonius

Lives in United States United States
Joined on Jan 5, 2008

Comments

Total: 128, showing: 1 – 20
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In reply to:

Roland Karlsson: So - we are quite sure that the ant eater is fake (or stuffed or whatever).

But - how about the rest?

The green lights in the termite hive? Supposed to be beetles.

The starry sky? - taken there? - taken by him?

The lights in the distant termite hive

The shooting star (or airplane)?

You see - if one thing is faked we cannot really trust the rest either.

Some of the other photographs by the same person won awards in some other places. (just google the name). e.g the shiny flowers against a sunset. a clear composite. but in that contest, composites were allowed, if declared. some photoshop enhancement was declared, but he never stated it was a composite. In any case, he has plenty of similar flower shots with lots of changed backgrounds and impossible illuminations of the flowers with those backgrounds.

Link | Posted on Apr 29, 2018 at 12:29 UTC
In reply to:

cosinaphile: i certainly am looking forward to united bokeh glowing at every step.... i will use dr rudolph lenses while drinking dr pepper , and while wearing my new dr sholls slippers while receiving treatment for gear acquisition syndrome....the facility address is......

Dr. Oetker's Pizza factory...

Link | Posted on Apr 21, 2018 at 20:13 UTC

Geier Optic announces the production of the phasmaorgic 67mm f 6.93 developed by Prof. Humperdinck.... ;-)

Link | Posted on Apr 21, 2018 at 11:35 UTC as 23rd comment

in science there are long lists of predatory publishers...

Link | Posted on Mar 23, 2018 at 21:53 UTC as 109th comment
On article Canon patents fingerprint reader for cameras and lenses (191 comments in total)

This makes sure that monkeys cannot take any pictures.... so no copyright issues with monkeys... ;-)

Link | Posted on Jan 30, 2018 at 11:43 UTC as 30th comment

Reminds me of the mythical "640K ought to be enough for anybody" quote. There will be never enough. Soon 8K video....

Link | Posted on Dec 7, 2017 at 10:06 UTC as 26th comment | 1 reply

Disappointing.
No silver special edition? No gold plated version? No wood handle? Is it made from bio-organic production according to vegan guidelines? Gluten free? Sodium free? Lead free? Radioactivity free? Lactose free? Protected with antioxidant extracts from goji berries? Titanium lens cap?

:-)

Link | Posted on Oct 28, 2017 at 20:27 UTC as 20th comment | 1 reply
On article Hands-on with new Tamron 100-400mm F4.5-6.3 Di VC USD (79 comments in total)
In reply to:

Photoman: How come Canon can do f4.5-5.6 with their lens, but Tamron can't.

oops, sorry I made a typing error when copying. yes, 63.5. Still, ~ 27% less for the glass.

Link | Posted on Oct 28, 2017 at 20:08 UTC
On article Hands-on with new Tamron 100-400mm F4.5-6.3 Di VC USD (79 comments in total)
In reply to:

Photoman: How come Canon can do f4.5-5.6 with their lens, but Tamron can't.

Material choices are one difference between Canon and Tamron. However, another is the f6.3 (Tamron), versus f5.6. 400/6.3 = 53.5 mm diameter, 400/5.6 = 71.5mm diameter. That's a factor 1.78 difference in area (i.e. a piece of glass would be 1.78 times lighter). Canon so far did not make anything slower than f5.6. The front of a 400mm is more weight determining than the back diameter of the image circle, so making it APS-C or FF does not make much difference.

Link | Posted on Oct 27, 2017 at 09:49 UTC
In reply to:

(unknown member): I owned a Polaroid as a kid. It's cool they're still making products! Maybe this will help make my D850 photos look better!

Hmm, you'd better read up on their history. After the bankruptcy, the business model was primarily licensing the "Polarid" brand name. So, if you pay enough cash, you can stick a Polaroid label on your T-shirt, and sell as Polaroid product. Actually, just in May this year, it was sold to a Polish investor (see dpreview news); they have a major share in The Impossible Project, which has the last Polaroid factory that produces still film. So, a tiny little bit of Polarid is still left.

Link | Posted on Sep 28, 2017 at 10:42 UTC
In reply to:

photonius: Too bad, a tad expensive. Also, I don't understand why they don't put in GPS in this travel camera, when they put in GPS in their much smaller travel cameras.

I don't like messing around with additional devices. You yourself seem to imply "if it works".

Link | Posted on Sep 16, 2017 at 09:10 UTC
In reply to:

photonius: wasn't that in Freehand? I recall drawing nice bezier curves in freehand and changing points if necessary

thanks for the info. The windows route - not my favorite.

Link | Posted on Sep 13, 2017 at 22:23 UTC

Nicely done. Yes, there are many ways to go beyond 1:1, as was frequently done in film/manual focus days (see also https://photonius.jimdo.com/macro/). Maybe some of that knowledge got lost in the digital area. I guess the key here is when Meike etc. released the automatic adapter to control a reversed lens about a year (?) ago. Before, only a below/adapter from Novoflex was available, though already for quite a while.

Link | Posted on Sep 13, 2017 at 22:17 UTC as 18th comment | 1 reply

how long do these ZINC prints last? years, decades?

Link | Posted on Sep 13, 2017 at 22:17 UTC as 6th comment

Too bad, a tad expensive. Also, I don't understand why they don't put in GPS in this travel camera, when they put in GPS in their much smaller travel cameras.

Link | Posted on Sep 13, 2017 at 22:14 UTC as 61st comment | 2 replies

Nicely done. Yes, there are many ways to go beyond 1:1, as was frequently done in film/manual focus days (see also https://photonius.jimdo.com/macro/). Maybe some of that knowledge got lost in the digital area. I guess the key here is when Meike etc. released the automatic adapter to control a reversed lens about a year (?) ago. Before, only a below/adapter from Novoflex was available, though already for quite a while.

Link | Posted on Sep 13, 2017 at 22:09 UTC as 20th comment
In reply to:

photonius: wasn't that in Freehand? I recall drawing nice bezier curves in freehand and changing points if necessary

Yes, Freehand was great.
Can you run an older version of MacOsX (10.4 or 10.6) in something like VirtualBox, or do you use Windows?

Link | Posted on Sep 10, 2017 at 20:52 UTC
In reply to:

JoaoPedroAB: Even liking and following most of technical discussions, I have a question. Maybe someone can help: why seems to be impossible using regular lenses (Nikons, Canons EF) with mirroless cameras directly? And, for instance, we would have the next Nikon D6 with dozens os lenses already in the market? Thanks in advance.

@Nicolas.

Of course it is possible to make a mirrorless with the same flange distance as a SLR. But then it's actually not a new system. You just can evolve your current camera line with bodies, some of which that have a mirror, some of which don't. It's just an evolution of the current bodies, and I expect this will happen eventually, when electronic viewfinder speeds become fast enough to compete with optical ones.
But then, if you eliminate the mirror box, why not go the extra step for a new system, which also allows you to make smaller bodies, and smaller UWA/WA lenses. All the current lenses can be used with a hollow tube adapter.

Link | Posted on Sep 9, 2017 at 11:58 UTC
In reply to:

JoaoPedroAB: Even liking and following most of technical discussions, I have a question. Maybe someone can help: why seems to be impossible using regular lenses (Nikons, Canons EF) with mirroless cameras directly? And, for instance, we would have the next Nikon D6 with dozens os lenses already in the market? Thanks in advance.

Well, the point about mirrorless cameras is that without the mirror box, you can make the camera less deep. Instead of a mount flange distance of 46.5mm you could have, for example, 18mm. You can fill this extra space with an 20mm adapter, which is essentially a hollow tube. This is, for example, how all the Canon lenses can be used on the mirrorless Canon EOS-M system. However, people don't seem to like such adapters that much, rather prefer lenses that mount directly. Lenses that mount directly, can then also be made smaller, mostly in the UWA and WA range, because of the shorter mount distance.
You could of course design a camera that keeps the original flange distance 46.5 mm mount. The body would be deeper for no reason, and you could not design the smaller UWA/WA lenses.

Link | Posted on Sep 8, 2017 at 14:19 UTC
In reply to:

thx1138: So I checked the patents and the 50mm lens is around 257mm long, or longer than my 300 f/2.8L IS, now that is simply ludicrous, even Sigma would blush.

Yup, there are so many elements in there, it looks huge.

Link | Posted on Sep 8, 2017 at 14:11 UTC
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