I used to carry a Nikon film camera with up to 600mm telephoto lens. This stuff was very heavy and bulky. Then when digital cameras improved enough I bought an Olympus 700C 10x zoom which was a very small digital that took pretty good pics. Then about 5 years ago I bought an Olympus SP-570UZ which has up to 20x zoom (not digital zoom). It cost about $650 when it first came out. A year later they came down to about $400. Now there are many high zoom cameras, but Olympus has been in the forefront of the small high zoom digital cameras.
Here are four pictures I have taken with the Olympus SP-570UZ. One is a picture of a mushroom called the Angle of Death because it is deadly poisonous which was taken at close range. The other one is a picture of a blue grosbeak that was taken at about 75 yards at 20x. the other one is of an antelope taken at about 100 yds. Then Devils Peak at about one mile at about 10x. The last one is devils peak at 20x. at about 1 mile.
OOPS: It is Devils Tower in Wyoming not Devils Peak. The edit button is deleted way to soon IMHO so people can not go back and fix their errors. On other Forums the edit is never deleted which IMHO is much better.
The grosbeak flew by me while I was riding on my ATV. I had never seen one before or since. I saw it land in a pin oak tree, but could not see him at that distance so I stood up and zoomed in to 20x and pointed to where I thought he was and snapped the picture. If it was not for the digital stabilization I don't think I would have gotten a clear picture. Everything seemed to come together at the right time. I was amazed when I got home and down loaded the picture and saw that he was centered in the frame.
PS: With this camera I do not need to carry different lenses. The one lens goes from SUPER MACRO all the way out to 20x.
Here are a couple of close ups: ( I blacked out the background around the IRUS in Photoshop ). I am not a professional photographer just a guy that has a trigger finger for a gun & a camera. The camera does all the work.
Nikon FM3A SLR film camera that works no matter how cold it is (My D200 dies in the cold). The FM3A will work with or without batteries. (But it is not an auto-focus camera.) Has an Aperture Priority mode too. Nikon FM3a
My AF-D lenses work on manual focus bodies - the G (AF-S) lenses will not work - there's no manual aperture ring on them - they stay at f/22 or smaller! So, I have a 70-210mm AF-D f/4-5.6 that works. AF-Ds have a manual aperture ring. Nikon 70-210mm f/4-5.6 Review