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 81 
 on: August 31, 2014, 09:11:34 PM 
Started by markwilliam - Last post by markwilliam
Thanks deejjjaaaa. I could probably figure out how to make a RAM disk out of some of my RAM. But my iMac is maxed out with 32GB of OWC RAM and it seems like it's best devoted to RAM, no? If I had much more RAM, then I might do well devote some of it to a RAM disk, but I don't have more on this machine.

 82 
 on: August 31, 2014, 09:07:43 PM 
Started by BernardLanguillier - Last post by BernardLanguillier
Photographs captured during another Awa Odori event in Tokyo this past weekend.













More after the link

All D810 + nikon 300mm f2.8 VR.

Cheers,
Bernard

 83 
 on: August 31, 2014, 08:59:13 PM 
Started by digitaldog - Last post by MHMG
Well, maybe we did overthink some of the points in this discussion, but hopefully it will help Andrew refine the way he presents some of the concepts in his upcoming video Smiley. For me, it has been fun.  I  have come to these conclusions:

1) All the RGB working spaces have exactly the same number of addressable color values and the total number is set by the bit depth of the image file, i.e., 8 bit, 16 bit, etc.).

2) All of these discreetly addressable values are visually discernible values but with three important caveats:  a) To be discernible each addressable color value must be applied to enough adjacent pixels in order to cover an area in the image that subtends a large enough viewing angle to be resolved by the human observer and b) Appropriate surround conditions must be met, i.e., the surrounding near neighbor color values are sufficiently different by at least 1 JND (just noticeable difference) to the human observer, and c) the surrounding color values must also cover image area that can be easily resolved by the viewer.

3) That leaves us with the important concepts of RANGE and SCALE (thank you Andrew).  ProPHoto covers a larger chroma range than aRGB and aRGB covers a larger chroma range than sRGB. The range of hues and range of lightness values remains the same in all of the working RGB color spaces.  Thus, Chroma is the only color property that gets expanded to a larger range and this is done by assigning higher numeric values on the  a* and b* scales when transforming the RGB triplets to CIELAB values.

4) The consequence of encoding a larger chroma range is that precision between the discreetly encoded color values is reduced, hence, the often recommended advice to use higher bit depth, especially with ProPHoto, to ensure that image editing software can manipulate the image tones and colors with sufficient mathematical precision to avoid subtle banding or posterization effects in the final image reproduction.

That's my best shot. Be gentle Roll Eyes

best,
Mark
http://www.aardenburg-imaging.com



 84 
 on: August 31, 2014, 08:49:46 PM 
Started by bambanx - Last post by melchiorpavone
Long time since I used these tanks but I believe they still engrave the solution volumes on the bottom of the tank and you will just need to add the volumes together for the number of films you are processing.

From memory there was a locking ring supplied to make sure that the reel stayed in place on the column if processing one film

This may be of help but not sure if current
http://www.photomemorabilia.co.uk/Paterson/Developing_Tanks/Instructions/System4.pdf

Regardless of the number of films loaded into the tank, always fill the tank completely. This will prevent over-agitation. If you are developing only one roll but the smallest tank you have is a two-roll tank, put two reels in it, and put the film on the bottom reel. This will ensure more uniform agitation.

 85 
 on: August 31, 2014, 08:48:05 PM 
Started by G* - Last post by eronald
Looks like the Merrill is a one trick pony, but what a trick it is!


Dave

+1. spectacular sensor, but good light only, and again a spectacular lens but only one.

Edmund

 86 
 on: August 31, 2014, 08:47:13 PM 
Started by digitaldog - Last post by GWGill
Saying "wider gamut" just shifts the burden to defining then "gamut." Besides, "more vivid colors" simply means more colors.
That's the point. Shift the burden to a valid viewpoint, rather than a nonsense one.

Colorspaces are conceptually continuous, not discrete, therefore it's wrong to talk about number of colors.
In practice they are often quantized for compact transmission of images, but this is orthogonal to gamut size, and rather arbitrary (ie. a power of 2). Ideally such quantization is too small to be perceivable and so isn't something you use to make the colors countable.

 87 
 on: August 31, 2014, 08:25:15 PM 
Started by rollsman44 - Last post by rollsman44
   Thank you all. I am keeping my 80/2.8. 

 88 
 on: August 31, 2014, 08:18:35 PM 
Started by BFoto - Last post by melchiorpavone
I have a canon 1d and 5d with lots of L glass. Havent needed 'new' so have only kept a glancing eye on the latest and greatest.

I have a niece wanting to start in the world of photography and has $2k to spend.

I have emphasised the need to spend more on better glass with a lower end body.

If u only had $2k, what would you buy today?


Older (used) full-frame stuff and basic lenses.

 89 
 on: August 31, 2014, 08:02:11 PM 
Started by wildlightphoto - Last post by melchiorpavone
Not landscapes? I don't get it.

 90 
 on: August 31, 2014, 08:01:10 PM 
Started by markwilliam - Last post by tived
Hi Mark,

There isn't a particular reason why I am using the 12x SSD's for my temp drive other then I needed 1TB of temps space for a project I was working on last year. If I could be bothered to rebuild I would probably swap it around so that my OS/APP's run on the 12x ...because I am only have PCIe 2 connections on the motherboard, I am may be maxing out the bandwidth. Newer boards have PCIe 3 which again is much faster and you can have more disks... my controller is PCIe 3 but replacing mainboard, CPU's and ram is just too expensive and filled with headaches (probably why many of you choose to go with a ReadyToGo Mac :-) ) but they are just too slow.

If you are not working on really big files e.g. multiple gigabytes in size then your 120/128GB SSD is fine for scratch/temp disk

The most time consuming task for the computer and this for all (PC and Mac) is writing to disk - so the faster you can get your read/write the faster your computer will be....Obviously CPU, GPU and ram is important, but these days they are all so fast, it really only storage that hasn't made the same speed progress, as the 3 others have.

You have some very nice drives from OWC, they have some really nice products - the only thing to add to your system is a backup system via Thunderbolt and you are set

All the best

Henrik

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