question about focal length multiplier

Isaiahfortythirtyone · 20th July 2005

hi guys. i have been reading about this Focal Length Multiplier. the 350D has that of 1.6x and Nikons have 1.5x(?) and so on.

i understand most of it, but am still confused somewhat

does this mean that what i see is NOT what i get? for example, if i see a WHOLE waterfall thru the viewfinder of the 350D, and i snap the shot, i will not get the whole waterfall in the picture? in the sense that parts of both edges will be cut off?

or

because of the multiplier, it changes the focal length of the lens. meaning if i have a 28mm - 105mm lens, i multiply by 1.6 to get 44-168 effective focal length on the digital slr? meaning that i lose the 'wide angle' effect? or...take a simpler example. if i use the canon 50mm f1.8II lens that is so popular, does that mean that instead of getting a 50mm field of view, i get a 50mm x 1.6 = 80mm lens in actual fact?

do i lose any of the picture at all because of this multiplier thingy?

is this why there are now special digital lenses like the DC and DG by sigma and the 18-200 DI II by tamron?

thanks guys

Del_CtrlnoAlt · 20th July 2005

for the waterfall part... its due to the viewfinder is not a 100% viewfinder...

if you jump direct to DSLR without using SLR, you won't understand the part... effectively, when you use film 28mm its suppose to cover this amount of width... but when using a crop factor, you might need 17mm to cover the same width from the same location.

nightwolf75 · 20th July 2005

pls do a search? this question has been asked numerous times.

else, read this.
http://luminous-landscape.com/tutori...dslr-mag.shtml

20th July 2005	#1
Isaiahfortythirtyone Senior Member Join Date: Jul 2005 Location: Clementi Posts: 2,470	question about focal length multiplier hi guys. i have been reading about this Focal Length Multiplier. the 350D has that of 1.6x and Nikons have 1.5x(?) and so on. i understand most of it, but am still confused somewhat does this mean that what i see is NOT what i get? for example, if i see a WHOLE waterfall thru the viewfinder of the 350D, and i snap the shot, i will not get the whole waterfall in the picture? in the sense that parts of both edges will be cut off? or because of the multiplier, it changes the focal length of the lens. meaning if i have a 28mm - 105mm lens, i multiply by 1.6 to get 44-168 effective focal length on the digital slr? meaning that i lose the 'wide angle' effect? or...take a simpler example. if i use the canon 50mm f1.8II lens that is so popular, does that mean that instead of getting a 50mm field of view, i get a 50mm x 1.6 = 80mm lens in actual fact? do i lose any of the picture at all because of this multiplier thingy? is this why there are now special digital lenses like the DC and DG by sigma and the 18-200 DI II by tamron? thanks guys

20th July 2005	#2
Del_CtrlnoAlt Senior Member Join Date: Feb 2003 Location: Outside the Dry Box. Posts: 16,342	for the waterfall part... its due to the viewfinder is not a 100% viewfinder... if you jump direct to DSLR without using SLR, you won't understand the part... effectively, when you use film 28mm its suppose to cover this amount of width... but when using a crop factor, you might need 17mm to cover the same width from the same location. __________________ Logging Off Permanently. Those who need to contact me will know where to contact me.

20th July 2005	#3
nightwolf75 Moderator Join Date: Dec 2003 Location: in bet MORE diaper changes... Posts: 14,592	pls do a search? this question has been asked numerous times. else, read this. http://luminous-landscape.com/tutori...dslr-mag.shtml __________________ When did ignorance become a point of view? - Dilbert budget AD/ROM shooter, anyone?