Dynax Digital Forums

Rob, have you every tried taking any ultra wide Ir shots with say a 10-20 or 17-35?

Lenses



Lenses that I have used or know that do cause hotspots

Konica/Minolta 17-70 kit lens
Minolta 17-35 G
Tamron 17-50 f/2.8


I know this list doesn’t have a lot of lenses on it at the moment, but it will be updated as myself and others find lenses that do or don’t work.

My Minolta 28-70G causes hotspots as well - seems like the G lenses aren't good for IR

I know that my old tokina 28-80 ATX-Pro worked and almost kept it for IR due to the hotspots with the 28-70.

Fud

Cheers Fud, have updated lens list

Rob

I just bought a sony 350k for the sole purpose of starting infrared photography. How do you set this thing up to where its not shooting black and red? Ive tried Manual mode and different. exposure settings to no avail. I could use some help.

Usually set the exposure 25 sec and f11 on Manual mode. But I have been trying different exposures to see if it would make any difference on the shots and I just get a black image on the screen. Im thinking its because the CWB isn't properly set.  Ive used a white piece of paper, a patch of green grass, etc with the filter on. and I'm shooting in daylight or mid-day from a shade and Im getting the same results. The camera would display an error message with the color temperature after trying to set the CWB. Ive read in other tutorials mentioning that with the correct CWB the images shouldn't turn out red but more of a brownish or grayish tones. How do I get the camera to do that?  I get red images in different modes but never in manual just a black screen and the closest IR image I get is in landscape mode which creates a brown sky but the foliage remains green. Oh, and as it is typical in IR photography to have longer shutter speeds, I dont see a difference in the shutter speeds at all when I adjust it. =/ As for sending you a picture of what I get, well its just black. I hope this information helps. Thanks for taking your time to help me.

Im using a Hoya R72. I use a 25 sec shutter speed on Manual mode when trying the customize the white balance and I don't get any images at all. Ive tried uploading the black shots on photoshop or adobe camera raw to see if there is any chance of adjusting the black shots to no avail. I dont think the filter is defective because if it was I wouldn't be able to get any shots at all in any of the modes. Yes, it is strange and Ive been trying to figure it out for approx a month. Im beginning to think the camera may be the one at fault or Maybe it's stuck on some setting that Ive overlooked...shouldn't though....But what do you think might be the prob?

Silly question, but are you sure you're using a 25 second exposure, not a 1/25th second exposure? 1/25 is displayed as 25 on the lcd, whereas 25 seconds is displayed as 25" ... I realise this is not likely to be the problem, but worth checking....

Don't apologise - no need, everyone was new at this at some point

To set the white balance on the a350 (or a300)

       Fn button -> [White balance] -> Select the desired setting

• When [AWB] is not selected, you can finely adjust the color tone with < / > on the controller. Adjusting it toward + turns the image reddish and
adjusting it toward – turns the image bluish.

• Use the white balance bracket function if you cannot get the desired color in the selected option (see page 100 of the manual).

• When you select [5500K] (ColorTemperature) or [00] (Color filter), you can adjust the value to the desired value.

• When you select  (Custom), you can register your setting (page93 of the manual).

      Fn button -> [White balance] -> [5500K] (ColorTemperature) or [00] (Color filter)

• To set the color temperature, select the value with < / >.

• To set the color filter, select the compensation direction with < / >.AWB (Auto WB) The camera automatically detects a light source and adjusts
the color tones.