Hard to go wrong with the classic 24-70 f2.8L (one of the “holy trinity” of lenses), but if you find you need more speed, there’s the EF 35 f2, the 50 F1.4 or f1.8 and the 85 f1.8, all of which are reasonably priced and will give you another stop or more in speed (you can buy all three for the price of the 24-70). If you’re feeling more well heeled, there’s an f1.2 or f1.4 “L” version of each. I’ve used the 85 f1.8 for indoor weddings and small groups many times, and at <$350, it’s fast, sharp and a bargain. I took my 5D3 and a 24-105 f4L to my son’s wedding (which was professionally shot) which was a fairly well lighted indoor venue, but no flash allowed and it took me about 2 minutes to run out to the car and swap it for the 85, which allowed me to shoot at the SS and ISO I wanted in available light.

Last weekend I saw a 5k mud/obstacle race and took my camera just to be doing something, I was at the finish line catching runners cross when the director of the event came up and gave me her card and ask for the photos, seemed real upset with her Photographer, said he was suppose to be covering that area but he was off playing with his drone.

That night I sent her the pics and she seemed to really like them and ask if I was available to cover a Gala there doing. Now for the question, it’s a late evening, indoor event and the location has dim lighting for these events. I only have a 24-105 f/4 lens and a 70-200 f/2.8. I think the 70-200 will be to long and I don’t think my 24-105 would be good with the lighting with it being an f/4. I’m considering renting or just going ahead and purchasing a 24-70 f/2.8. Flash and setting up lights isn’t an option here. Do y’all agree or do y’all think my 24-105 would handle it?

I usually do all my work outdoors and with natural light but I don’t want my equipment to limit me. I’m shooting with a Canon 5D mark iv. I have done indoor, lowlight work with my 70-200 and was happy with the results but never worked with the 24-105 in these conditions.

Last weekend I saw a 5k mud/obstacle race and took my camera just to be doing something, I was at the finish line catching runners cross when the director of the event came up and gave me her card and ask for the photos, seemed real upset with her Photographer, said he was suppose to be covering that area but he was off playing with his drone.

That night I sent her the pics and she seemed to really like them and ask if I was available to cover a Gala there doing. Now for the question, it’s a late evening, indoor event and the location has dim lighting for these events. I only have a 24-105 f/4 lens and a 70-200 f/2.8. I think the 70-200 will be to long and I don’t think my 24-105 would be good with the lighting with it being an f/4. I’m considering renting or just going ahead and purchasing a 24-70 f/2.8. Flash and setting up lights isn’t an option here. Do y’all agree or do y’all think my 24-105 would handle it?

I usually do all my work outdoors and with natural light but I don’t want my equipment to limit me. I’m shooting with a Canon 5D mark iv. I have done indoor, lowlight work with my 70-200 and was happy with the results but never worked with the 24-105 in these conditions.

Last weekend I saw a 5k mud/obstacle race and took my camera just to be doing something, I was at the finish line catching runners cross when the director of the event came up and gave me her card and ask for the photos, seemed real upset with her Photographer, said he was suppose to be covering that area but he was off playing with his drone.

That night I sent her the pics and she seemed to really like them and ask if I was available to cover a Gala there doing. Now for the question, it’s a late evening, indoor event and the location has dim lighting for these events. I only have a 24-105 f/4 lens and a 70-200 f/2.8. I think the 70-200 will be to long and I don’t think my 24-105 would be good with the lighting with it being an f/4. I’m considering renting or just going ahead and purchasing a 24-70 f/2.8. Flash and setting up lights isn’t an option here. Do y’all agree or do y’all think my 24-105 would handle it?

I usually do all my work outdoors and with natural light but I don’t want my equipment to limit me. I’m shooting with a Canon 5D mark iv. I have done indoor, lowlight work with my 70-200 and was happy with the results but never worked with the 24-105 in these conditions.

Your 24-105 f/4 is fine. I use my RF 24-105 and or 24-70 f/4 over my 24-70 f/2.8 all the time. I shoot these events 3 or 4 times a week as they are my "specialty". Here are my settings for these types of events, shutter speed, 1/100 to 1/125, aperture, f/4 (wide open) Auto ISO, usually 6400 to 12,800 (your 5D Mark IV can handle 12,800). Shoot slow to minimize ISO. Try to shoot small numbers of people in a group (2 to 4) to minimize DOF issues with f/4. Use flash if possible with the flash compensation, in the camera, turned down 1/3 to 2/3 stop to prevent blowing out the facial highlights, I have used a color gel (1/4 orange) on the flash as well but this takes some practice/experience. If you can use flash, use 1/100, f/4, ISO 1600 to 3200. With flash you don't need high shutter speeds as the flash stops motion over shutter. You can shoot as slow as 1/80 with flash if you want to show some background but be careful with slow shutter speeds motion blur can be a problem. Good luck!