Search results for 'uv filter' - page 308
Anyone here keep their 6MP SLRs for infrared?
Conversions are quite common in the USA, where IR photography has a stronger following than here. I have friends who have had the conversion done, removing the "hot filter" and replacing it with a similar but transparent piece of glass. Then you do indeed have an IR camera. For casual use, the *i...
Posted by johnriley on 10/01/2010 - 12:39
Anyone here keep their 6MP SLRs for infrared?
I think I'd rather just use the R72 filter! I think there's a general rule that says the first camera you take apart is also the first camera that you break beyond repair........ Jon
Posted by JonSchick on 10/01/2010 - 21:07
Anyone here keep their 6MP SLRs for infrared?
Yes you're right Greg, it's UV but you also see differences in the IR spectrum. SOme plants reflects them less then others for example, but yes UV would be better for flowers.... is there something like UV photography btw? I recently got a new IR filter for £10 via e-bay (China), which gives workab...
Posted by petrochemist on 19/03/2010 - 19:58
Anyone here keep their 6MP SLRs for infrared?
A K20d (or at least a GX20) isn't much good with an R72 filter. The IR pass filter is much stronger so longer shutter speeds are needed and the results are blurry and poor unless the subject is completely still (and even then the shots are noisy). Much easier to convert an old camera! Point and...
Posted by WobblyGoblin on 19/03/2010 - 22:01
Anyone here keep their 6MP SLRs for infrared?
I spoke to Advanced Camera Services at the recent Focus Show. They do infrared conversions and list the Pentax itD as one of the cameras they will convert. I spoke to their representative on the stand about converting one of my Pentax DSLRs to infrared. He said that he would not now want to convert ...
Posted by grahamwalton on 19/03/2010 - 23:01
Pentax users hate photoshop
I can see that Photoshop has it's uses but I generally make an effort to avoid using it (partly because it's not installed on my latest machine):wink: I like Photomonk prefer to concentrate my efforts in CaptureOne with perhaps a little additional work in Helicon Filter (if required).
Posted by Greytop on 15/01/2010 - 14:54
Pentax users hate photoshop
Hey guys, very very new here, but felt this is at least one thread I can contribute to. I've worked in Advertising for over 20 years, been using Photoshop professionally since version 2 and I've seen outstanding, beautiful photography but that's a rarity to be honest in my business. Most of th...
Posted by P_H_I_L_L on 16/01/2010 - 20:33
Pentax users hate photoshop
I disagree with the thought that all photos need post processing. If the image needs to be post processed, Film or Digital, it was not a quality photo in the first place. I have made a living doing this with film. Steven So you only ever shot slide film and never had them printed? As soon as you...
Posted by womble on 10/02/2010 - 18:33
"In the Wind" Making of Photo Shoot Video
I was asked for a more specific technical lighting explanation, here is the short version: I shot most of the production at 1/4 to 1/15th of a second depending on the rendering desired.I used a mix of 2 X 2.5 Kilo HMI flicker-less cinema lights for the backdrop which I lit at around f11.0. The o...
Posted by benjikan on 17/01/2010 - 12:28
Why are polorising filters so expensive?
Bob, there is no point in having a decent lens if you put a couple of slabs of frosted glass in front of it. Modern filters from major suppliers apply coatings to them just as lens manufacturers do. Remember that a polarising filter is primarily two finely finished filter elements placed in a holder...
Posted by cedricd on 28/01/2010 - 19:19
Why are polorising filters so expensive?
Some of the cheap polarisers aren't bad. I've got three of the "Green Filter" ones from Hong Kong (49mm, 52mm and 58mm) and I've had surprisingly decent results considering the price.
Posted by Dangermouse on 28/01/2010 - 20:15
Why are polorising filters so expensive?
Here is a little tip, get a linear filter instead of a circular it save you some money and the linear also work better I believe. :)
Posted by Anvh on 28/01/2010 - 20:41
Why are polorising filters so expensive?
Here we have it cedricd do you want to do the test on that page, I don't have a linear filter :( there is an easy test which can often indicate whether or not a camera needs a circular polarizer. Attach a linear polarizer to the camera and take a TTL meter reading off a blank wall illuminate...
Posted by Anvh on 28/01/2010 - 21:11
Why are polorising filters so expensive?
Is the meter not reading one stop less because the filter is reducing the amount of light the meter sees?
Posted by bforbes on 31/01/2010 - 15:52
Why are polorising filters so expensive?
Barrie you are confusing me now :D The light hitting the film-sensor stays the same if you turn the filter, but the meter is getting confused by the filter so the meter is not metering correctly any more. The problem is that it's a TTL meter so it meters through the lens so it needs to look th...
Posted by Anvh on 31/01/2010 - 16:39
Why are polorising filters so expensive?
Polarising filters reduce the amount of light and therefore require more exposure. The amount of light loss varies depending on how the filter is turned. The light loss amounts to between approximately 1 and 2.5 stops.
Posted by johnriley on 31/01/2010 - 16:40
Why are polorising filters so expensive?
Thank you John, that's correct but I believe we are/were talking about Cedric's results from page 1. I asked him to do this test there is an easy test which can often indicate whether or not a camera needs a circular polarizer. Attach a linear polarizer to the camera and take a TTL meter reading...
Posted by Anvh on 31/01/2010 - 16:53
Why are polorising filters so expensive?
With a linear you've 1 stop difference when turning and with circular none... that's still pretty good measurable in my eyes. Still if it has no effect when shooting then it isn't a problem. Although you said here. If there is no polarised light, then you won't do a thing by turning a polaris...
Posted by Anvh on 31/01/2010 - 17:04
Things to Learn from Cinematography
BAD EXAMPLE. CSI Miami. To much use of orange grad filter on the sky. CHEERS Vic.
Posted by vic cross on 31/01/2010 - 10:55
UV or not UV
Bit from another thread, Advice please Hi, also bought a Kx recently for much the same reason as Derek and starting to learn, Decades ago when I had a film SLR it was common practice to have a filter (I think UV) fitted which stayed on permanently - as much as to protect the lens as to improve ...
Posted by Darstadlydarcey on 06/02/2010 - 14:03
