i had 2 sigma lens prime
28mm old old more than 20 years old, af with screw mount still could lock pretty fast apart from noisy af.
50mm sigma with hsm seems fast enough for my use which is great.

all depends ur technique of focussing la
point to contrasty area easier to focus, depends on lighting condition, af points (cross type), lens that support AF-D, blah2.
if still cannot then peeking mode all the way.

now working nearby putrajaya can go sunrise & sunset everyday
sorry if seems gelap, edit on phone ony





in spirit of merdeka
fb quality


This post has been edited by mastering89: Aug 16 2014, 11:57 AM

I am a user of Sigma 19mm. If you want sharpness, go for this lens but bear in mind, it is not exactly a wide angle lens. But If you want wider, you can always go for Sony 16mm (which can be used with the fisheye adapter but sacrifice corner sharpness). Else, go for Samyang fisheye!

In terms of price-performance ratio, Sigma 19mm f/2.8 DN E should top the list, if you're ok with no OSS.
One of my shot taken with Sigma 19mm F2.8 EX DN (not art series).


Suwa Lake (諏訪湖) by gsuraki, on Flickr

Dear Pay Ng. its not angle of light, but the angle of light wavelength. polarizer works with wavelength, not angle of light dude. wavelength is under Physics.... due to the angle of wavelength travels from the side of the lens angle, the polarizer were unable to cut off the angle of wavelength, hence it did not cut off the light as it suppose to.

as for the Variable ND, u will get X-crosses effect at certain angle on UWA due to the angle of light wavelength escape the polarizing.

do u wan banana?

note: not aiming at you, but in general, why does ppl think 16-20mm is comparable to a 10-18 ultra wide angle? totally diff thing, totally diff effect, totally diff impact on the photo.


uraki: 16mm also no OSS.

and generally, i dont understand why ppl generalize 16mm as not sharp(corner)? at F2.8, generally all wide angle arent sharp in corner due to distortion via deflection in the lens group. all wide angle requires to stop down to gain corner sharpness... even the famous sharp tokina 11-16 is soft in corners until stopped to F8. even SEL1018 requires to stop down a little more to gain prefect sweet spot.

just roughly know how polarize filter works...

yup, asked myself... yes it's fast

u need to get the facts right man. there's no such thing as angle of wavelength. the closest thing to that is every wavelength of light has a different critical angle but we assume that light is just one wavelength, thus when we do third order approximation (real life), aberrations occur, but that is not in this topic.

As for why polarizer does not work with UWA, go read on Malus Law. the formula is I = I0 (cos (x))^2, where x is the angle between the initial light polarization and axis of polarizer and I0 is the initial intensity of light.

Since I0 is constant initially, the only thing affecting the intensity after the light passes through the polarizer is the value x. But then, the cos x can only result in values between 0 and 1 (and by extension, (cos x)^2 is the same too)

That is why you will have varying intensity throughout the frame because the angle is different.


Source: Wikipedia, and I am a Physics student. took this blardy course last semester lol.

p. S. I'm Ray Ng, not Pay

Does anyone joining the Sony Alpha Super Workshop next week??
http://www.sony.com.my/microsite/AlphaSuperWorkshop/

now only ask? haha. just kidding

anyway, i believe most of alpha user may attend this workshop

no cost?

i believe no. sony didn't mentioned of we had to pay upfront

*removed*

There is hotel checkin woh! no cost? Sony so generous? If 1000 people go, how they afford?

i believe this time is limited seat

ya. don't know still have seat or not.

have a try for apply 1st?

I think need to pay since it's overnight. The website does not show much details other than schedule.

If anyone here registered please share info. Thanks!

Eh, you guys did not register for the alpha super workshop?
Someone from Sony called me this morning for confirmation of attendance.

Sony fb page mentioned it is free and the person called me did not ask for payment so I'm pretty sure the workshop is FOC.

cya there ya~ lol

wow! sony rreally doing great marketing here! bravo! this is great that it shows Sony is getting very serious on their camera business, great for all Sony camera users (inclusive myself).