All Forum Comments
Comment by jackruss posted on Mirror / back-up software at 15/12/2008 - 15:38
here is exif data:-
Make = PENTAX
Model = PENTAX K20D
Orientation = top/left
X Resolution = 240
Y Resolution = 240
Resolution Unit = inch
Software = Adobe Photoshop CS3 Windows
Date Time = 2008-10-12 20:42:09
YCbCr Positioning = co-sited
Exif IFD Pointer = Offset: 218
[Camera]
Exposure Time = 1/30"
F Number = F11
Exposure Program = Shutter priority
ISO Speed Ratings = 200
Exif Version = Version 2.21
Date Time Original = 2008-10-12 19:44:30
Date Time Digitized = 2008-10-12 19:44:30
Components Configuration = YCbcr
Shutter Speed Value = 4.91 TV
Aperture Value = 6.92 AV
Exposure Bias Value = ±0EV
Metering Mode = Spot
Flash = Flash did not fire, compulsory flash mode
Focal Length = 300mm
Flashpix Version = Version 1.0
Color Space = sRGB
Exif Image Width = 800
Exif Image Height = 610
Interoperability IFD Pointer = Offset: 662
Sensing Method = One-chip color area sensor
Custom Rendered = Normal process
Exposure Mode = Auto exposure
White Balance = Auto white balance
Focal Length In 35mm Film = 450mm
Scene Capture Type = Normal
Contrast = Normal
Saturation = Normal
Sharpness = Normal
Subject Distance Range = Distant view
I love the subject distance range
Comment by jackruss posted on Playing with my telescope at 15/12/2008 - 00:15

Comment by jackruss posted on Playing with my telescope at 14/12/2008 - 18:12
and
Comment by jackruss posted on Thought I would have a go at a Moon shot. at 16/10/2008 - 23:13
I am new to all this stuff and have gone out and got myself a k20d and a couple of kit lens 18-55 pentax 2 and a sigma (dg) 70- 300 with macro switch and I have been using them just fine (well happy emoction).
Now I have some older len's manual, a tamron 90mm macro and a 28mm PK unknown make.
The question is I'm getting confused on this x or devide by 1.5 thingy.
So when I mount the len I get a input focal length what should it be ?
28 x 1.5 =42 or 28 / 1.5= 18
90 x 1.5 =135 or 90 / 1.5=60
many thanks in advance for an answer I can understand
Comment by jackruss posted on kit lens or older lens? at 16/09/2008 - 23:03

