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Sigma Super-Wide II 1:2.8 24mm on A7r3
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PostPosted: Sat Sep 19, 2020 5:33 am    Post subject: Sigma Super-Wide II 1:2.8 24mm on A7r3 Reply with quote
This windmill is one I have been intending to visit for several years, having seen it many years ago. I took several legacy 35mm and medium format lenses with me. Images from each will be uploaded as a separate topic. Because of the number of lenses involved, and the subject, I used f11 as standard. I decided to set ISO 100, not available on my m4/3 camera. This, as with some other lenses used on the day, was purchased in response to an account of it in this forum, no lemons so far!

I had used the lens on a previous, recent, occasion without its hood (images not processed yet). This time the hood was in place. The sun was to my left side.

The sensor had some dust so I have cleaned up the uncropped images.





Crop








PostPosted: Sat Sep 19, 2020 6:13 am    Post subject: Reply with quote
It seems to me a bit useless to have shot everything f11, because at that small aperture all the lenses are performing pretty decently and any unique characteristics that they might have are pretty well gone.


PostPosted: Sat Sep 19, 2020 6:41 am    Post subject: Reply with quote
kymarto wrote:
It seems to me a bit useless to have shot everything f11, because at that small aperture all the lenses are performing pretty decently and any unique characteristics that they might have are pretty well gone.


I am not looking for characteristics. I am looking for how they work for me. I have another series, from an earlier session at f8.

I am not a fan of wide open apertures.


PostPosted: Sat Sep 19, 2020 6:48 am    Post subject: Reply with quote
At F11 you can replace any lens with compact camera (telephone lately) without noticeable difference. Sorry had to say it.


PostPosted: Sat Sep 19, 2020 7:10 am    Post subject: Reply with quote
Pancolart wrote:
At F11 you can replace any lens with compact camera (telephone lately) without noticeable difference. Sorry had to say it.


Not true. There are many factors to consider, but clear differences are discernable.


PostPosted: Sat Sep 19, 2020 7:19 am    Post subject: Reply with quote
iangreenhalgh1 wrote:
Pancolart wrote:
At F11 you can replace any lens with compact camera (telephone lately) without noticeable difference. Sorry had to say it.


Not true. There are many factors to consider, but clear differences are discernable.


I tried 7 lenses (I had more with me, which I had to omit).

One, not yet uploaded, showed CA towards the edges.

There is public access to the windmill and I had to pause on several occasions. Stereo shots with people moving between frames are a disaster.

By the time I got to using the last two lenses (40mm & 75mm) the sun had moved round and was causing flare. There was no point in having some lenses shooting into the sun and some not. A further series at other apertures was out of the question. A compromise but one that suited me.


PostPosted: Sat Sep 19, 2020 7:59 am    Post subject: Reply with quote
Just get the shot and don't worry about what people on the internet say Smile

Up here in the Lake District, the light can change drastically in a minute or two, so I just shoot and worry about it later.


PostPosted: Sat Sep 19, 2020 8:21 am    Post subject: Reply with quote
iangreenhalgh1 wrote:
Just get the shot and don't worry about what people on the internet say Smile

Up here in the Lake District, the light can change drastically in a minute or two, so I just shoot and worry about it later.


I shoot to please myself too!

That day was significant in that it was to be, and was, cloudless. So no changes in exposure or WB, especially relevant for stereo pairs.

I have been posting images for so many years that I can now donate skin grafts to Rhinos! Laugh 1


PostPosted: Sat Sep 19, 2020 11:09 am    Post subject: Reply with quote
The Sigma is a good value option when looking for a manual 24mm, but there are many bad ones out there because of Sigma's build quality. I had one that was quite decentered before I found a better one. For landscape and architecture using F11 is fine. You can still see geometric distortion and flaring characteristics. What also makes this one interesting is the close focussing ability to 18cm. 1:4 magnification.

Here @f10 you can see plenty of character (Ok the bokehgons were caused by fine raindrops on the front element :p). This is the decentered one btw.
Hete Kolen by instant g r a t i f i c a t i o n, on Flickr

Last edited by D1N0 on Sat Sep 19, 2020 11:19 am; edited 1 time in total


PostPosted: Sat Sep 19, 2020 11:18 am    Post subject: Reply with quote
D1N0 wrote:

What also makes this one interesting is the close focussing ability to 18cm. 1:4 magnification.


That makes it interesting to me too. And it's small and light, handy to put in the bag with regular lenses!


PostPosted: Sat Sep 19, 2020 11:44 am    Post subject: Reply with quote
Of the mf 24's I have tried, it's a toss up between the superwide II and the tamron adaptall 01B/BB 24mm for sharpness, IMO both are sharp. I think the tamron isn't so good on fullframe - softer edges/corners.

I took these test pics a year ago. Pentax K3-ii. sigma SWII top. f2.8, f5.6, f11. Tamron 01B below f2.5, f5.6, f11






Tamron:




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