Back at the start of the year, wishing to pursue my passion for wedding photography and knowing that my trusty 50mm wasn't going to be as versatile as I would like it to be, I decided to research other lenses that were more suitable for the varying light and difficult challenges are to be faced with wedding photography.
I wanted a lens with a varying focal length and the two that were mentioned the most were the 70-200mm f/2.8 and the 24-70mm f/2.8. My budget was limited and therefore the 24-70mm f/2.8 seemed like the more appropriate option. With the Nikon 24-70mm f/2.8 priced at over £1000, the Sigma 24-70mm f/2.8 EX DG lens was more appealing, priced at around £400.
Subsequently, I purchased the Sigma 24-70mm EX DG f/2.8 and put it to the test at a baby naming ceremony in Colchester that I was helping to photograph.
The lens for me seemed to be very loud when focussing so this was a negative from the offset really considering I wanted to use it mostly in wedding photography where the quieter you are, the better!
I also found the Sigma 24-70mm zoom ring to be very stiff to turn and it required quite a bit of effort to get the lens to fully extend at the 24mm end of the focal length range.
The Sigma 24-70mm is sharpest at the wide end of its focal length range. At 24mm, the Sigma 24-70mm is very sharp at f/3.2. However, the performance of the lens gets gradually worse as the focal length is increased. I found that to use this lens at 70mm f/2.8, the image was pretty much out of focus entirely. Upping the aperture to f/5.6ish helped a lot and the image became a lot shaper but for me this was less than ideal. I wanted to be able to quite often use the lens at 70mm f/2.8 and this just wasn't possible.
In the end, after consistantly failing to achieve the level of quality that I required, I ended up selling my Sigma 24-70mm f/2.8 and purchasing the nikon 24-70mm f/2.8! I wouldn't recommend the Sigma 24-70mm f/2.8 to anyone that asked for my advice, and would say just bite the bullet and go for the top of the range lens. It may be more expensive but it will save you money in the long run!
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