QUOTE(bsm @ Jul 23 2007, 02:13 PM)
thanks man. u set out all the options really nicely for me. sorry for asking, how does constant aperture lens differ from normal lenses. cant u just set the aperture on the kit lens too? btw..u forgot to include sb-600 which would cost me another 700?
sorry...the smaller number on lenses state the distance or width? coz someone once told me it was the width
Sorry I missed out on the Sb-600, didn't know you were getting it all one shot. Lucky you!
Constant aperture lens means that at any focal length, the biggest aperture size you can can be a constant f/stop.
For eg. Tamron's 18-50mm f/2.8
from 18-50mm range also it can be set to f/2.8 which makes it a fast lens.
However, for eg. the 18-135mm f3.5-5.6G, at 18mm, it can open widest to f/3.5 and at 135mm aperture can only open biggest to f/5.6. This makes a lot of diff compared a f/2.8 lens.
QUOTE
Zoom lenses without constant aperture will have diff biggest aperture at different focal lengths.
Simplified:
]# 18mm f/3.5
# 24mm f/4
# 35mm f/4.5
# 50mm f/5
# 70mm and higher f/5.6
Another reason why I am not getting the 18-200mm VR lens is that it has very bad distortion at 18mm compared to the kit lens.
18mm at 18-200mm VR
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18mm at 18-135mm kit lens
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Added on July 23, 2007, 4:45 pmQUOTE(bsm @ Jul 23 2007, 03:01 PM)
ah ok..no wonder...someone once told me like 18-135, 18 is the width and 135 was the length. thats why a bit confused. damn...now 50mm 1.8 shinchan?? im sooo confused. i especially want a lens that can zoom quite a bit so i can take photos from far e.g. concerts and stuff. not that far like all the way from the back but i mean if im a bit far that the lens can help me zoom quite a bit.
Save the RM350 on the 50mm 1.8d for the lenses I recommended if you don't need the 50mm.
The 50mm 1.8d is a very sharp lens, great for portraits, close ups and macro (paired with close up filter/extension tubes/reverse ring)
One good thing about the 50mm 1.8 is that it's really fast.
It's great for indoor low light photography without flash.
But the downside is that it's not a variable zoom lens.
Which is why I ask you to invest on a Tamron 18-50mm f/2.8.

Added on July 23, 2007, 4:52 pmQUOTE(d8kd @ Jul 23 2007, 03:22 PM)
70-300 is a slower lense as compare to 18-200.
options 5 is indeed a good choice, might source for 2nd hand lense right now

prepare to spend RM6500 - RM8000 for the basic set. hahaha ... that's killing.
hmm ... might consider 18-200 or the 70-300 then
I don't think you should compare 18-200mm with 70-300mm.
The working range for both lenses are different.
70-300mm is more of a dedicated telephoto, so it doesn't have the speed available on the wide angle part of the 18-200mm.
QUOTE
Biggest aperture on the 18-200mm VR
18mm f/3.5
24mm f/3.8
35mm f/4.2
50mm f/4.8
70mm f/5
135mm and higher f/5.6
QUOTE
Biggest aperture on the 70-300mm VR
* 70mm f/4.5
* 100mm f/4.8
* 135mm f/5
* 200mm f/5.3
* slightly over 200mm and up f/5.6
If you compare the same focal lengths, clearly you can see the 70-300mm VR lens is a slightly faster lens than the 18-200mm.
This post has been edited by calvin_gsc: Jul 23 2007, 04:57 PM