50 mm f1.8 has brighter exposure?

[speedblade]

there's been some talk of exposure on, say a 24-70 at 70mm, f4 and another 24-105 IS also at 70mm, f4 ..... The shutter speed *should* be the same ....but seems like the 105 lens is giving a lower speed.

Not sure how true .... anyone have these lenses to try?

 

[Ren_Hao]

Well, how about redoing the test?
Shoot without flash, prehaps than we can really see if the 50mm 1.8 is really "brighter"
if I am free, i might even do it this weekend and post the results since i also happen to have all 3 mentioned lens, but than ho, hope someone else can do it before mi and share the results

 

[catchlights]

Yes, another test,
camera mounted on tripod, no flash, M mode, with the same speed and f-stop, if you are shooting outside using day light, check for lighting condition constancy thru out thr test.

 

[melcheong72]

i will do another test tonight and post the images here. one thing i notice the 50mm actually make the subject nearer compared to the other lenses. so far it seems that the kit lens has very poor contrast. will post fot all to see later.

 

[Snoweagle]

In comparison, the 50mm f/1.8 II is considered a bright lens.

 

[ConnorMcLeod]

In comparison, the 50mm f/1.8 II is considered a bright lens.

The pics shown have significant difference in the brightness.
I don't expect the difference between the lenses can be so much.

I had this bad luck before shooting with a lens with faulty aperture control and it was always wide open.... and the camera would think it has control on aperture... then I got pics like those shown. *touch wood*

 

[Snoweagle]

The pics shown have significant difference in the brightness.
I don't expect the difference between the lenses can be so much.

I had this bad luck before shooting with a lens with faulty aperture control and it was always wide open.... and the camera would think it has control on aperture... then I got pics like those shown. *touch wood*

I usually don't shoot it at f/1.8 end, usually at f/2.8 max. Cos i find at f/1.8, it's quite soft.

At f/2.8 indoors with normal lighting, you can get a considerably gd shutter speed of 1/60.

 

[Ah Pao]

Please make sure you're not doing this test in fluorescent lighting. It flickers.