18-55 f3.5-5.6 vs 24-40 f2.8


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Mar 6, 2007
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#1
Hi,

Can I know the difference between these 2 types of lens. I need a lens to best take potrait pictures when I'm out on a family occassion. One of it is the kit lens but the focal length is shorter than the other. I'm thinking that shorter focal length would be a better choice.

Please advice.

Thanks.
 

Simon_84

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Mar 18, 2004
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bukit batok
#2
how about a sigma 30mm f1.4?
helps in low lighting surroundings.
the sigma is cheaper than the 24-40 f2.8 or else just sell your kit lens and get a tarmon 17-50mm f2.8 instead.
 

Mar 6, 2007
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#3
its actually a tokina 24-40 f2.8, i was offered $120 to get it.

i dun tink i can sell my kit lens. saw it at the personal classified and whole lot of ppl is selling it but no takers.. lol...
 

Simon_84

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Mar 18, 2004
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bukit batok
#4
whats your cam body ?
if can AF why not ?

got ppl sell your kit lens at 200 before is the lowest i'll seen cause i bought mine at a high 260.
now i think if can sell at 250, very lucky already.
have to hope those d50 and d40 users looking to change their kit lens to higher quality version of 18-55mm.
 

Mar 6, 2007
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#5
whats your cam body ?
if can AF why not ?

got ppl sell your kit lens at 200 before is the lowest i'll seen cause i bought mine at a high 260.
now i think if can sell at 250, very lucky already.
have to hope those d50 and d40 users looking to change their kit lens to higher quality version of 18-55mm.

lol.. im using 30d right nw.. i dun tink it can fetch tat high price now.. abt 150? lol..
 

Simon_84

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Mar 18, 2004
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#6
i bet your lens should be out of warranty already can sell for around 90-110 is not bad already, go view the market place and observe what the current 2nd hand market price right now.
 

calebk

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Jul 25, 2006
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Clementi
#7
... One of it is the kit lens but the focal length is shorter than the other. I'm thinking that shorter focal length would be a better choice.
...
I don't quite understand this reasoning. Care to elaborate on it?
 

Mar 6, 2007
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#8
Sorry,

What I meant was that I always tot tat for example 18mm is only for shooting close range and 300mm is shooting far objects.

Since my kit lens cover 18-55mm, is there a need to get a 24-40mm f2.8 lens as both covers about the same range.

I may be wrong, please guide me through.

Thanks.
 

calebk

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Jul 25, 2006
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Clementi
#9
No that is not entirely correct. I can use 18mm to take long-ranged subjects and 180mm (macro lens) to take close, small objects too.

Focal length does not link so specifically to subject size as much as it does to field of view. That is the way you should judge.
 

#10
The focal length of your lens would determine the angle of view. Just look through your viewfinder and see the angle of view at 18mm as compared to 55mm. If you are looking for a fast lens to shoot indoors, I would suggest the Tamron 17-50 f/2.8. It gives you the option of a wide angle if you are in tight spaces.

To know if the focal length is enough for what you shoot, just use your 18-55 and turn to 24mm and to 40mm, and that is the range you will have on the 24-40 lens. Not much of a range, and I believe the 24-40 is a FF lens.
 

Mar 6, 2007
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#11
The focal length of your lens would determine the angle of view. Just look through your viewfinder and see the angle of view at 18mm as compared to 55mm. If you are looking for a fast lens to shoot indoors, I would suggest the Tamron 17-50 f/2.8. It gives you the option of a wide angle if you are in tight spaces.

To know if the focal length is enough for what you shoot, just use your 18-55 and turn to 24mm and to 40mm, and that is the range you will have on the 24-40 lens. Not much of a range, and I believe the 24-40 is a FF lens.
Wow.. A post speaks everything.. Thanks!

Just a small question, what do you mean by field/angle of view?
 

Benosaurous

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May 21, 2008
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#13
i always want to ask this noob question,

so are the angle of field and lens characteristics the same with every lens on the same length?

example: 24mm of 16-35L, 24mm of 24-70L, 24mm of 24mm L?

so will the flare and distortion issue of wide angle lens be gone when they are use further on the longer end?
 

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