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there was a 500mm f5.6 mirror lens out there . pretty cheap....I wonder how well that would autofocus with the af 1.7 teleconverter....that would be like a 1300mm f10 telescope (roughly).
Comment by Don posted on mirror lenses Centon 500 - f8??? at 07/12/2007 - 19:52
reading the rumours....there's to be raw. jpeg and ????
perhaps microfts new jpeg format they've been pushing?
HD photo?
perhaps microfts new jpeg format they've been pushing?
HD photo?
Comment by Don posted on speculation on k20's mystery file format? at 07/12/2007 - 16:42
Kim C wrote:
http://strobist.blogspot.com/2006/02/strobist-terms-of-service.html
Quote:
I would be careful with such a post. Lifting words direct from another website without stating the source can be construed as copyright infringement.
I think Strobist about sums up fair use:I would be careful with such a post. Lifting words direct from another website without stating the source can be construed as copyright infringement.
Quote:
Strobist is the product of countless hours of hard work and it is very important to me that I protect the value of the original content. Everything you see on Strobist is copyright David Hobby in the year that it was first published. (In the case of third-party contributors, they retain the copyright.) That does not mean that you cannot use material from the site, only that there are a couple of rules.
If you want to link to the articles, that's cool. It's what makes the blog world spin. Feel free to post brief abstracts of the original posts -- the pithier the better. Please limit your verbatim "excerpts" to two or three paragraphs at the most. A prominent link to the original source is required, lest we confuse anyone about the source of the content.
Wholesale cut-and-paste reproductions of entire posts are strictly prohibited and will taken very seriously. That is copyright infringement, plain and simple. This blog is my entire livelihood, and if you are going to jeopardize my family's income, I will come after you.
Strobist is the product of countless hours of hard work and it is very important to me that I protect the value of the original content. Everything you see on Strobist is copyright David Hobby in the year that it was first published. (In the case of third-party contributors, they retain the copyright.) That does not mean that you cannot use material from the site, only that there are a couple of rules.
If you want to link to the articles, that's cool. It's what makes the blog world spin. Feel free to post brief abstracts of the original posts -- the pithier the better. Please limit your verbatim "excerpts" to two or three paragraphs at the most. A prominent link to the original source is required, lest we confuse anyone about the source of the content.
Wholesale cut-and-paste reproductions of entire posts are strictly prohibited and will taken very seriously. That is copyright infringement, plain and simple. This blog is my entire livelihood, and if you are going to jeopardize my family's income, I will come after you.
http://strobist.blogspot.com/2006/02/strobist-terms-of-service.html
Comment by Don posted on Pentax K20D at 08/12/2007 - 16:09
of course, one could fit a larger (say 18 mp) sensor into a digital body, and call it a 14 mp camera.
Why?
well if you only used 14mp central area of a larger 18 mp chip, for creating the images, but also used the remaining outer area of the sensor (possibly with lenses/masks placed over it) for exposure/color balance/noise calculations...
esp with live image preiview, that might be workable and affordable, also if you were buying 18mp sensors for medium format camera bodies that were already obsolete....
lays the design for a full frame model option too if one wanted to keep that door open...
Why?
well if you only used 14mp central area of a larger 18 mp chip, for creating the images, but also used the remaining outer area of the sensor (possibly with lenses/masks placed over it) for exposure/color balance/noise calculations...
esp with live image preiview, that might be workable and affordable, also if you were buying 18mp sensors for medium format camera bodies that were already obsolete....
lays the design for a full frame model option too if one wanted to keep that door open...
Comment by Don posted on Pentax K20D at 07/12/2007 - 20:58
yep so true.
It may be dumb luck that it failed after you sold it.
it may be rough handling, but the post office.
it may be the guy who bought it broke it.
Any way you cut it, it may boil down to "What is your reputation worth vs. what was the camera worth.
It may be dumb luck that it failed after you sold it.
it may be rough handling, but the post office.
it may be the guy who bought it broke it.
Any way you cut it, it may boil down to "What is your reputation worth vs. what was the camera worth.
Comment by Don posted on Please help, stuck focus ring at 06/12/2007 - 14:11
I'm with you on that point too....
18-55, 16-45, 12-24, 16-50, is all too much....
Pentax needs to drop the 18-55, make the 16-45 the basic "KIt" lens (imagine the reviews in the media when the kit lens on the Pentax holds it's own against the competitions "Pro" lenses!).
Drop the 12-24, take a smidge off the price of the 16-50.
entry buyers choose the 18-250 or 16-45. simple.
advaned buyers, 16-50 everybody wins, esp Pentax's reputation for having the finest kit lenses in the industry!
When the bodies prices- drop (due to aging specs), then the price for the total kit remains the same (as todays), and when new bodies become available you'll want to buy one, cause you already got great glass.
18-55, 16-45, 12-24, 16-50, is all too much....
Pentax needs to drop the 18-55, make the 16-45 the basic "KIt" lens (imagine the reviews in the media when the kit lens on the Pentax holds it's own against the competitions "Pro" lenses!).
Drop the 12-24, take a smidge off the price of the 16-50.
entry buyers choose the 18-250 or 16-45. simple.
advaned buyers, 16-50 everybody wins, esp Pentax's reputation for having the finest kit lenses in the industry!
When the bodies prices- drop (due to aging specs), then the price for the total kit remains the same (as todays), and when new bodies become available you'll want to buy one, cause you already got great glass.
Comment by Don posted on Building your own set of lenses in Pentax World at 05/12/2007 - 14:41
I prefer to buy the right lens to begin with, but here's a software package.
I've never used it...but it looks good.....
http://www.kekus.com/software/plugin.html
I've never used it...but it looks good.....
http://www.kekus.com/software/plugin.html
Comment by Don posted on What Software at 03/12/2007 - 18:16
light tent.
somewhere in the past I posted a how-to on making a $10.00 light tent with a collapsable laundry hamper. that's solve your problem quite nicely.
somewhere in the past I posted a how-to on making a $10.00 light tent with a collapsable laundry hamper. that's solve your problem quite nicely.
Comment by Don posted on Umbrellas - Bounch or shoot-through at 14/01/2008 - 14:40
yep.
one common mistake people make is to think that one flash needs to be set lower than the other to give a light ratio...(ie 2:1).
that is true for an individual portrait, but with groups using the 45deg setup you describe, the flashes should be putting out equal power.
carefull aiming of lights will get it right. (see my earlier post.).
one common mistake people make is to think that one flash needs to be set lower than the other to give a light ratio...(ie 2:1).
that is true for an individual portrait, but with groups using the 45deg setup you describe, the flashes should be putting out equal power.
carefull aiming of lights will get it right. (see my earlier post.).
Comment by Don posted on Umbrellas - Bounch or shoot-through at 11/01/2008 - 15:57
I say use anything. from white foamcore, tinfoil and cardboard, bedsheet, strobes, hotlights, mirrors, whatever. the only good advice is this...if you're spending your hard earned money....get the best quality you can afford. look for build quality.
then practice with it till you've learned to get the most out of it. for best results, in portraits get those lights as close to your subject as you can. softness in light is subject to the size of the light source relative to the size of the subject. the sun is huge, but because it is soo far away it appears small, and therefor creates a hard light on the subject
look at the elinchrom quadra (largest square softbox, under lighting solutions) to see what I use, and you'll notice a similarity between it and an umbrella, it actually is a giant umbrella and sets up in seconds!!! it's like four feet across!
http://elinchrom.com/
then practice with it till you've learned to get the most out of it. for best results, in portraits get those lights as close to your subject as you can. softness in light is subject to the size of the light source relative to the size of the subject. the sun is huge, but because it is soo far away it appears small, and therefor creates a hard light on the subject
look at the elinchrom quadra (largest square softbox, under lighting solutions) to see what I use, and you'll notice a similarity between it and an umbrella, it actually is a giant umbrella and sets up in seconds!!! it's like four feet across!
http://elinchrom.com/
Comment by Don posted on Umbrellas - Bounch or shoot-through at 04/12/2007 - 12:57
