I just did some testing of my old lenses. I previously had a Tamron G1 24-70mm F/2.8. The croner sharpness drop off was sort of noticeable but I mainly ditched it as I rarely used anything but 24mm. So I got a Sigma 20, Nikkor-PC 28mm, Nikkor-PC 35mm Nikkor 50mm f/1.2. All quite nice and sharp. and small! easy to keep and bring anywhere while mostly using the Sigma.
However I recently decided to try this cheap 35-70mm f/2.8 D out and it si pretty amazing. It is sharper centrally than the Primes and edges are not much less sharp than the primes. And its drop off is only the far edges.
Are there any other cheaper old zooms that hold up as well? For example how nice is the 20-35mm F2.8D? Might it compliment this 35-70 quite well? Mostly do landscapes. Opinions?
I used and tested a lot of zooms within that range as it is a useful and sometimes necessary combination in my line of work.
There is a lot of sample variation with the 35-70/2.8 Earlier versions may develop 'fog' or 'haze' due to incorrectly glued glass elements. This was fixed in later versions. The last batch of the 35-70/2.8 AF-D which were made after 1995 are the best. Production stopped in 2005. If you can find a late mint sample it is a top class lens: Very sharp and neutral, natural colours. It's relatively small size compared with the later 24-28-70 versions is a great bonus.
The Angenieux is unique in rendering, both with light, colours and bokeh, but not really a cheap zoom.
For landscape and architecture the Nikkor 35-70/3.5 Ai (72mm) is very good choice, pretty cheap (around +100 euro) but difficult to find a good sample. Not sure if it is sample variation but I like the latest version with the circular rear protector best.
Another really nice lens in this range is the Nikon 35-70 f3,5 Ai (with 62mm filter thread)
I think that is the Ai-S version. Distant objects are not the strongest points of this lens, but closer objects and the macro capabilities are unique.
For landscape the Nikkor 25-50 f/4 is the winner. Not a cheap lens (200 euro plus), and difficult to get in Europe, most (good) samples come from the US or Japan.
The Nikkor 28-50/3.5 is also a good versatile lens, very compact.
If you want wider the Nikkor 17-35/2.8 AF-S is hard to beat, but that is not a cheap lens.