Hi folks , Ive been looking at some samples of pictures from a particular machine and along with ISO and other settings it show something like 38mm and sometimes it changes to 90mm and so on . What does t means? Its the zoom?
Another question is what setting do you recommend when taking pics of planes flying . Once I took a fast snapshot of a ship far awaywhen the bus was at 30mph and the unique thing Ive set was the ISO ( I didnt knew at that tome how to change the time of exposition 😀 ) and the pic was fine for me . So there are any chats showing the correct ( or aproximate at best ) settings you should put your machine to shoot fast objetcs on the net?
Last question ( phew 🙂 ) what does this lens specification means ? Is it good for a novice ? : # Carl Zeiss Vario-Tessar lens (3x optical zoom)
# F2.8 – F5.2, 38-114mm (35mm equiv.)
Thanks in advance!
By: Malandro - 28th January 2006 at 17:32
Tks for the imput Hallo .
By: hallo84 - 23rd January 2006 at 22:55
“38mm and sometimes it changes to 90mm”
In a nut shell it means the length of the zoom. i.e. the length the lens actually extends. The higher the number the higher the magnification.
ISO is the sensitivity of the film or in digital the sensitivity og the CCD/CMOS chip.
ISO is quite important in shooting film as there are many techniques to push/pull develope. especially in aviation photography higher ISO means less exposure times and certainly better sharpness but at requced resolution.
In digital cameras ISO is not as importantas film. i.e. the difference of CCD chips and film. I found that digital camera can capture faster exposure at lower ISO settings. But it all depends on the lighting conditions and such. I’ve taken great 1/1000sec exposures at ISO100 and lower
I take it your camera is a Sony digital?
Carl Zeiss makes arguably the best lens in the world, good SLR or comercial optics that is. If I had the $$$ all my lens would’ve been Zeiss…
On regular snap shot camera it’s really almost all the same no matter the brand…
The lens specification means that this camera should be able to extends it’s lens from 38mm to 114mm long. FYI not really important but always good to know…the (35mm equiv.) means because the CCD chip is smaller in size than the 35mm film effectively the barrow of the lens is actually extends a lot shorter than the stated 38-114mm but you get the same effect as the 38-114mm.
F2.8 – F5.2 means the diameter of the diaphram. It measures the amount of light actually gets through to the CCD. The lower the number the more light gets through. On 35mm photograpgy the range extends from F1-F64 where F1 means no restriction on light getting through.
On a snap shot digital the range is quite small but that’s all to do with the limitation of CCD, the lens constrction (all too technical to explain here) and the fact that the average joe don’t even know what it is.
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January 19, 2006 at 5:37 pm