Total Noob Lens Question: EF lens recos for Alaska cruise

[GRAYWOLF69]

I have used various P&C digital cameras, but I have minimal experience with a DSLR. I am going on a cruise to Alaska in a few months.
I am looking to rent a Rebel T7i. I am wanting to try to get some shots of wildlife and other interesting sights from the ship. Basically looking for how to pick the right telephoto lens. I do not understand how the numbers translate into anything meaningful.

*I did try to search, but only got a post about matching lens and camera, not about decoding lens labels.

[ebiggs1]

Nice find and very cool you got some old family photos back as a bonus. First 300mm is still going to be too short for my liking but it may do all you want. That's your decision.

"There is dust on the lens ..."

Never rub a lens any lens with something totally dry. No matter if it your eyeglasses or a camera lens. Get a real lens cleaning solution.

"is leaving a black goo on my fingers when I touch it. Is there a way to clean it, or replace the rubber?"

I doubt it but you can try 90% alcohol on a Q-tip. You might be able to completely remove the rubber coating.

[ebiggs1]

BTW, this find is much better than renting. Plus make sure you have some extra 1GB CF cards for your trip. I would get five at least. One a day is a good idea.

[GRAYWOLF69]

I have a 256GB card on order. Not sure how many pictures it will hold, but I am hoping it will be enough...at least a day's worth so I can move them off to the laptop to clean it up.

@$75, it is the best $/GB card I found.

[GRAYWOLF69]

Thanks for everyone's help.
Now, time to start playing with the camera to get used to using it!

[GRAYWOLF69]

This seems like a "too good to be true" deal...What am I missing?
Amazon has this lense for $140:

Ultimaxx 650-1300mm (w/ 2X Teleconverter 1300-2600mm) Telephoto Zoom Lens Set for Canon