Please forgive me if I am treading on already-discussed ground; but what has experience been so far with regard to the new Sigma 50 1.4 in either dusty environments or damp (like humid or rainy) environments? Reviews say 'not weatherproofed'-- does this entail some clear-cut difference between their lens and, say, the Canon's 1.2 or 1.8 lenses? The difference in weight is of no consequence to me. Thank you for your advice.
From the reviews I've seen, I don't think any of the "review" lenses have been in any kind of harsh environments. The Canon 50 f/1.2 is the only Canon that is weather sealed, and the new (not yet released) Sigma 50 Art is not weather sealed. The Canon 50 f/1.2 has all switches and seams sealed and has a rubber gasket on the mount to seal with Canon's weather sealed bodies (1D, 5D, 7D, 6D, and x0D series). A UV filter is required for full sealing, but it would survive dusty, rainy, and humid locations. The Sigma may do okay, but it wouldn't be a good idea to take it out in those environments if they were really harsh.
That's something I don't understand of Sigma, they made their DSLR fully weather sealed and their new 120-300mm weathersealed, but the rest are kind of resistant to bad weather.
From personal experience the weather sealed tag is not all its cracked up to be , I have had a 24-70L and a 24-105L succumb to sand getting in the works and a 17-40 which was only 1 year old had a hole form in the rubber gasket meaning it was not sealed , all had filters fitted. I have two 70-200Ls both of which have collected dust inside the elements ( not that it affects anything ) but again they had filters.
My kit has been in harsh conditions with a few -8 degree days each year in the highlands , varying wedding environments from blistering sun to snow and pouring rain and plenty of beach river and sea shoots. To be honest the only thing i have found different in good quality glass such as the 17-55 2.8 and the 35mm F2 IS is not the quality of picture or bokeh but the fact it looks good to others that it has a red ring and somehow makes you more professional which is not really the case.
That said with the advances in optics and technology is there such a thing as a bad lens now manufactured ?www.andrew-davies.com
north east and yorkshire wedding photographer