Search results for 'back focus' - page 2262
Blue tint from a polarizer
I'm struggling to see anything wrong. It looks like normal strong daylight to me. I would be more concerned with the focus, but it's a nice shot. The focus seems slightly off to me.A nice image though:wink:
Posted by sanderscapes on 27/06/2009 - 06:09
Blue tint from a polarizer
Thanks far all the constructive help, I am constantly impressed as to how helpful everyone is on this site. Don: I'll fire up Photoshop and give that a go. Dan: Thanks for the link it was most illuminating if you forgive the pun. Do you think I should have used a different white balance ...
Posted by Technoblurb on 27/06/2009 - 08:00
Blue tint from a polarizer
At 300mm this is an extremely long lens and inevitably, even stopped down, the DOF is wafer thin so focus has to be extremely accurate and the camera should be on a tripod. I think aerial haze is apparent in your picture and a UV or skylight filter might have been more useful than a PL which is goin...
Posted by gartmore on 27/06/2009 - 09:10
Blue tint from a polarizer
Thanks gartmorem, the irony is I took my UV filter off in preferance to my polorizer. :D Regarding the tripod, I took a series of experimental shots with my camera mounted. They were all set too manual focus, 250mm, iso 100, shake reduction off and every f stop the lighting conditions allowed. The ...
Posted by Technoblurb on 27/06/2009 - 13:43
Blue tint from a polarizer
Have you got the eyepice dioptre set accurately? Point the camera at a blank surface and as out of focus as you can make it, then adjust the dioptre until the viewfinder graticules are as sharp as possible. Sometimes using a tripod just isn't quite enough, if you are on a wooden floor or spongy g...
Posted by gartmore on 27/06/2009 - 13:49
Blue tint from a polarizer
Your focus is off, the DOF lie directly behind the bird. If you look had the birds feet and then to the rock on the right of that you can clearly see it. Remember that the DOF at 55mm is quite a lot wider then DOF at 250mm with the same aperture. :wink:
Posted by Anvh on 27/06/2009 - 15:52
Blue tint from a polarizer
I used my Sigma 70-300 f5.6 for this shot and it is proving the a constant frustration, if I don’t shoot at around f8 the focus gets even worse. Any suggestions on how I could tweak the camera to compensate or do I drop it in a skip and start again. Thanks Again :D It's quite a long lens and i've...
Posted by sanderscapes on 28/06/2009 - 01:17
Blue tint from a polarizer
Thanks Martin, I will give the dioptre a go today and see what happens, if this does not work then I will contact Sigma. When this shot was setup the puffins eye was dead centre in my viewfinder (I cropped the image to remove dead space) and is in the centre of the RAW file. However as Stephan point...
Posted by Technoblurb on 28/06/2009 - 08:29
Blue tint from a polarizer
Found this information on the pentax I am focusing on a persons eyes but am finding in the image their ears are the sharpest point in the picture. Is my lens faulty. This is a phenomenon with digital SLRs. If the image sensor is fractionally out of alignment, even by microns, the point of focus ...
Posted by Technoblurb on 28/06/2009 - 09:28
Blue tint from a polarizer
It can be that the AF is not calibrated correctly. With the K10D there is a special Debug mode but you can only adjust the whole focus systen for all lenses while with the K20D you can do it for 20 seperate lenses. So find out if it's just one or that all the lenses are out of focus. IF it's jus...
Posted by Anvh on 28/06/2009 - 10:04
Question
It's a relatively new term that refers to the appearance of the out of focus areas in an image. Technically, the number of leaves in the diaphragm in the lens will affect bokeh, generally more leaves equating with a smoother look. I get the feeling that sometimes it's referred to as being much mo...
Posted by johnriley on 27/06/2009 - 20:56
Question
Here you have an example of smooth bokeh. Just look at the blurred daisy's in the background. It was shot wide open with the SMC K 1.8/55. In-Focus area was razor thin, just at the tip of the birds metal beak. The way bokeh appeals to the human eye, is still (despite countless discussions...
Posted by Malo1961 on 27/06/2009 - 22:35
Question
The way bokeh appeals to the human eye, is still (despite countless discussions) a very subjective matter. Martin. Not really Martin, good it isn't always black and white but some lenses clearly have a better bokeh then others. From here Fig. 1. Poor Bokeh. This is a greatly magnified...
Posted by Anvh on 27/06/2009 - 22:43
Question
I've mixed feelings about the article linked to, as it says some pretty dubious things, many of which would be hard to prove or disprove. Although I can see what is being got at, I'm not convinced that we really have a set of rules that we can apply that describe bokeh. I've seen some horrible ef...
Posted by johnriley on 27/06/2009 - 22:56
Question
Martin, who said that a poor bokeh is bad for a photo??? Sometimes a poor bokeh is fitted for certain photos and sometimes not, that's subjective. If the bokeh is fitted for the photo or not but not the quality of the bokeh. And that's the comment in fig.3. It's commonly accepted that the older ...
Posted by Anvh on 27/06/2009 - 23:37
Question
I keep reading the term 'bokeh', I don't wish to sound daft, but wassit mean? Some people use it to mean specifically out of focus highlights, others just to mean everything that is out of focus. It's easier to see differences for the former between one lens and another (when all else is equal), not...
Posted by iceblinker on 27/06/2009 - 23:38
Question
So, having read the article linked to by Stefan, i wonder if we think there's something in this or whether it's a csae of "The Emperor's New Clothes" or maybe the descriptions at a wine tasting. What I can say is that if there is such a thing as good bokeh, then my Pentax 55-300mm certainly posse...
Posted by johnriley on 29/06/2009 - 00:11
Question
I think for most subjects the more blurry(fig3, also sometimes called butery, smooth, silky) the OOF areas the better the effect on the image. However it allways depends on the subject. Sometimes better defined edges in the bokeh work better. Its a matter of the subject and of taste. What one sh...
Posted by edumad on 29/06/2009 - 10:52
Question
Thanks for putting in the effort Stefan. It's becoming clearer that we are thinking along totally different lines as this is not really what I had in mind. John then you probable have the meaning of the term bokeh wrong. Wiki Bokeh (derived from Japanese, a noun boke 暈け, meaning "b...
Posted by Anvh on 29/06/2009 - 19:11
Question
John then you probable have the meaning of the term bokeh wrong. There is no such thing as right or wrong when it comes to the meaning of words. Some photographers use "bokeh" for the appearance of OOF light points, others for everything that is OOF. "Bokeh" is the Japanese word for fuzzy. It has...
Posted by iceblinker on 29/06/2009 - 20:18
