As Am states, it would be handy to know what gear you have. Are you after action, do you have track side access?
Filter
EOS R & 16-35 f4 EF, 70-200 2.8 RF
Olympus OMD-EM1 Mark II 7-14 12-40 40-150 Pro lens.
EOS 7D Mark II - 70D - Canon EF 100-400mm f/4.5-5.6L IS II USM, 17 - 55 2.8 Lenses
sorry forgot to mention i have a 55-250mm and a 18-55 mm efs lens
Next question. Have you ever photographed moving animals before? if not. get out and do so. seagulls, dogs running in the park, anything. You will need to get your panning skills cause no matter what lens you use, the photos will be crap if you do not have the skills to get the shot. Use your 55-250
"It is one thing to make a picture of what a person looks like, it is another thing to make a portrait of who they are" - Paul Caponigro
Constructive Critique of my photographs is always appreciated
Nikon, etc!
RICK
My Photography
As Ricktas has said, you can hire all the lenses, and cameras in the world, but if you've never shot a moving animal before, you're not going to get many great shots. it takes loads of practice, and time to get great photos of horses racing around a track. Maybe find someone with a horse that will let you practice first?
thank you all - off to practice i go
As far as racing photos go, i've seen three basic angles. n These are head-on, side-on and from under the running rail. You need to decide whether you want to shoot these and select a lens for the angle(s) you want to shoot. Your 55-250 might be a bit short for the head-on unless you want to wait till they're right on top of you. It will do the side-on shots for you. For the under-rail shots, you'll need something like a 10-20 for an APS-C sensor of a 16-35 for a FF sensor. You'll need permission for the under rail stuff and a remote unless you spook the horses. Practise with the right lenses and in the the right angles.