Oi airconvent, where is your Sigma 30mm shots?


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Vulpix0r

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Oct 2, 2002
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#1
Waiting for some samples from your copy!:sweatsm:
 

airconvent

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Apr 12, 2005
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#2
haha....its a 30mm F/1.4 but sadly for Pentax mount its not HSM.
Thanks to Feng wei and you for the alert. Helped greatly. The seller is quite a nice fellow who bought it direct from Japan thinking it was an HSM lens only to learn HSM only available for C and N. Now with the K10D supporting, its not impossible for sigma to release an HSM version. This one I have is pretty noisy and wow...pretty heavy too. With the lens, I felt as if I was carrying the k10D ! ;)

Here are some initial shots (taken soon after I collected the camera and on way home)

Lens cap on table :



Night scene - Distant



Night scene - Near

 

airconvent

Senior Member
Apr 12, 2005
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#3
Bush under street light



Car under street light



Cup Indoors



18-55 Lens Indoors

 

airconvent

Senior Member
Apr 12, 2005
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#4
Bokeh Test #1





Bokeh Test #2



cheers!
 

airconvent

Senior Member
Apr 12, 2005
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#5
BTW. any idea why there is glare on the 18-55mm lens? This caused the lens not to appear black as it should be.
I tried from several angles but the result is always the same. Is it due to strong reflection from the table? Do advise...thanks
 

peapilot

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Sep 9, 2005
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#6
It doesn't look black because you spot metered on the black barrel without exposure compensation.
 

airconvent

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Apr 12, 2005
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#7
It doesn't look black because you spot metered on the black barrel without exposure compensation.
Hi
Thanks for the feedback...How do I correct this? I needed to lock onto the lens to ensure proper focus.
cheers
 

VSonic06

New Member
Dec 24, 2006
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#9
BTW. any idea why there is glare on the 18-55mm lens? This caused the lens not to appear black as it should be.
I tried from several angles but the result is always the same. Is it due to strong reflection from the table? Do advise...thanks
Its taken at f1.4 right? Try stopping down eg. 2.0, 2.8, 4.0 etc. You'll lose background softness but stopping down usually fix the blooming caused by super large apertures.

Also try shooting text at different apertures to show how well it handles contrasty details.
 

creampuff

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Jul 11, 2006
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Dover
#10
er... is there a reason why many of your pictures are tilting to the left?
 

airconvent

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Apr 12, 2005
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#11
Its taken at f1.4 right? Try stopping down eg. 2.0, 2.8, 4.0 etc. You'll lose background softness but stopping down usually fix the blooming caused by super large apertures.

Also try shooting text at different apertures to show how well it handles contrasty details.
thanks vsonic06 and peabody..
will try it out.
cheers
 

airconvent

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Apr 12, 2005
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#12
er... is there a reason why many of your pictures are tilting to the left?
holy cow! you are right! I hadn't noticed that earlier. Could it be barrel distortion?
In anycase, I noticed slight vignetting in the right corner for some situations...not sure if this is normal. :think:
 

night86mare

Deregistered
Aug 25, 2006
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#13
holy cow! you are right! I hadn't noticed that earlier. Could it be barrel distortion?
In anycase, I noticed slight vignetting in the right corner for some situations...not sure if this is normal. :think:
? That amount of tilt can be barrel distortion?! :think:
 

dnaxe

Senior Member
Oct 5, 2006
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#15
holy cow! you are right! I hadn't noticed that earlier. Could it be barrel distortion?
In anycase, I noticed slight vignetting in the right corner for some situations...not sure if this is normal. :think:
is it true for your pics with other lenses as well? (the tilt?)
 

creampuff

Senior Member
Jul 11, 2006
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Dover
#16
Let's hope it is not the misaligned sensor issue that some in dpreview are said to have encountered.
 

ykgen

New Member
Sep 9, 2004
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KL, Penang
#17
it is not a barrel distortion.. distortion should happen around the pix.. not tilt just 1 side.. better check ur camara.. or your hands..
 

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