#apochromatic

[wrooom]

Under Cover Of Darkness 

By Gordie Freedman

[brooklynmuseum]

It’s a rare scenario when hanging a painting sideways right in the middle of a 20’ wall seems like a good idea! This week presented just such a moment. Paintings conservators sketched out (literally) the elaborate plan and then collaborated with staff from collections management and photography to work out the logistics for this unusual documentation project.

The spotlighted painting is William Williams’s portrait of Deborah Hall, a star of the Brooklyn Museum American Art collection that must be thoroughly documented prior to a major treatment. Using an apochromatic lens and a powerful flash moved to 50 different illumination locations, we captured images that will be processed using reflectance transformation imaging (RTI) software to create a highly detailed rendering of the painting’s complex surface.

Brooklyn Museum conservators have used RTI on smaller objects, but this was by far our largest-scale effort. The translation of the sketch to the action above may look straightforward, but it required significant pre-planning and on-the- spot troubleshooting, and an additional challenge was that the work space (within the Infinite Blue gallery) was only available for two days. Thanks to a creative and determined team, the mission was accomplished.

Follow along here for the RTI results (coming soon!) and for updates on Deborah Hall’s treatment status.

Posted by Jessica Ford

[spacettf]

M101_April2017_HomCavObservatory by homcavobservatory Via Flickr: M101 is a face-on, grand design spiral galaxy lying approximately 21 million light-years from Earth. Containing the equivilant of 1 trillion solar masses, it spans about 170,000 light-years from edge-to-edge. Fairly large, it appears over 28 arcminutes in diameter in our sky (i.e. approximately the size of the full moon), and can be found in the constellation of Ursa Major. Often referred to as the Pinwheel galaxy, it shares that moniker with the galaxy M33 in Triangulum. The attached image is via our wide-field imaging system and covers over 3 degrees (i.e. 6 full moons) in width, with North at left. Several other smaller and fainter galaxies can found near M101's; to it's lower right is the round galaxy NGC 5474, to it's upper left the edge-on spiral galaxy NGC 5422 and to it's lower left and just discernible in this image are NGC 5473, 5485 & 5486. Taken by Jay Edwards at the HomCav Observatory in Maine, NY while out shooting the most recent comets on the morning of April 19th using an Orion ED80T CF Triplet Apochromatic Refractor connected to a 0.8x Televue field flattener & focal reducer, CamRanger, IPad and Canon 700D DSLR; and guided by an Orion StarShoot autoguider connected to a Celestron 80MM short tube refractor; all riding on an Orion SkyView Pro goto mount guided by PHD, this image is nearly full frame and has been resized down here to HD resolution and the bit depth lowered from 16 to 8 bits per channel to reduce the file size.

[thephoblographer]

The Best Prime Lenses for the Leica SL2-S

A special lens element makes these lenses so much better.

There are wonderful lenses made by Leica that photographers aspire to shoot with. With the Leica SL2-S, photographers get the best durability mixed in with the Leica image quality they crave. Everyone also knows that prime lenses are the optics that help create all those images we dream of. So we figured that we’d round up the best prime lenses for the Leica SL2-S. Looking for some beautiful…

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[thephoblographer]

Laowa 25mm F0.95 Review: Beautiful Bokeh of Your Dreams

This is an exceptional lens in so many different ways.

I truly believe that the Micro Four Thirds format is host to some of the most fascinating lenses out there. It’s also the oldest mirrorless camera system besides the Leica M. Lots of third party lenses, like the Laowa 25mm f0.95, help give it desirable flavor. Compared to Voigtlander’s competitor, more photographers might want to reach for the Laowa optic instead. Besides the beautiful lens…

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[thephoblographer]

There's Something Very Special About This Leica 50mm F1.4 Lens

Get ready for better portraits with this lens!

For more stories like this, please subscribe to The Phoblographer. For my fellow Leica lovers here, if you know, you know. But for the rest of us, you might not realize why this Leica 50mm f1.4 lens is just so special. I could do a very sales-y thing by telling you all Leica lenses are special. But that wouldn’t help anyone, and this site doesn’t do things like that. Right now, the Rare Camera…

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[nicolasonline]

«Lot of stars» Aside from Camelopardalis 66/400 refractor - Astrotrac mount - Canon 1000D (via Flickr https://flic.kr/p/2jbKdm5)

[ambroisecharron]

Maki - #apochrom #apo #apochromat #apochromatic #maki #lemurcatta #lemur #lemurien #lemuriens #lemurs #makimococo #madagascar #madagascar🇲🇬 #nikon #nikond5 #nikon200mm #nikon200 #nikon200mmf2 #nikon200mmf2vr #nikon200vr2 #nikon200vrii #ringtailedlemur #lemuridae #lemuridaes #primate #primates #strepsirrhine #strepsirrhineprimate #strepsirrhineprimates https://www.instagram.com/p/BvJQ9Gbgz5a/?utm_source=ig_tumblr_share&igshid=k7dh5ead1bf2