bobbygee wrote:
Thanks for the response. I'm trying to stop her from buying a 55-200 or 70-300 f/4-5.6 type lens, especially for indoor. I use the Nikon 70-200 f/2.8 and wanted to hear from some Canon folks.
Hopefully, yes, you can stop this poor choice of lenses for indoor work. The 55-200 and 70-300 are fine general purpose lenses, but not for indoor lighting.
A lens with an f/2.8 max aperture is workable for indoor, but we all know HS indoor sports will typically occur under less than prime-time lighting. A few ideas:
The Canon EF-mount Tamron 70-200 f/2.8 zoom, for a price savings. The current model is: Tamron SP 70-200mm F/2.8 Di VC USD
The Canon 70-200 f/2.8L versions. I like the IS support, where there are vI, v II and vIII options, two used and the v III current, each more expensive.
Canon primes might be a better option, such as the EF 85mm f/1.8, EF 100mm f/2, EF 135mm f/2L or EF 200mm f/2.8L. The first three options pair well with the cropped sensor EOS T7, each getting 'closer', where maybe even too close if the photographer can get close in a smaller gym setting. The zooms might be more practical, even if their max aperture is 1-stop slower in the low-light. The Canon f/2.8L lens options offer the ability to use a teleconverter (extender) even out to an effective 400mm on the EOS T7, so these lens options work both indoors and outdoors for at-a-distance shooting.
One very modest price idea is the EF 50mm f/1.8, about $125 for the current "stm" version. That's about an effective 80mm on a Canon crop and might be useful from close-to-action work indoors, where a larger investment and the optimal focal length can be determined from images captured at the 80mm field of view. The 50mm prime would pair well with the useful 18-55, where the lenses can be changed to the lighting situation.
To cutback some on the sticker shock, look to the used market for available lenses.