evall95 From Australia, joined Aug 2011, 306 posts, RR: 0 Posted (1 year 4 months 4 weeks 16 hours ago) and read 4164 times:
I am considering in investing in the Sigma 2x teleconverter to try and get closer to some aircraft and possibly get some high altitude aircraft shots. I have a couple of questions. Firstly, I am using a Nikon D3100 with a Sigma 70-200 f2.8 so I was just wondering if the teleconverter is compatible with my lens and body? Secondly, because of a crop sensor my 70-200 is a 105-300 so does it double to 210-600? If so will that be long enough to get some contrail shots? Lastly, what are the pros and most importantly the cons of a teleconverter? Is a lot of light and quality lost?
megatop412 From United States of America, joined Sep 2005, 309 posts, RR: 0
Reply 2, posted (1 year 4 months 4 weeks 6 hours ago) and read 4116 times:
Keep in mind that while doubling your focal range, the quality(sharpness and contrast) of your images will decrease to the point that a superzoom like the 50-500mmOS will rival the lens/tc combination. Some say 'but you can always take off the teleconverter and have a great quality 70-200mm f/2.8'. And to them I say 'yes but now you lose 70-140mm'(a sacrifice I would not be wanting to make)