What are the alternatives to the voigtl nder apo skopar 90mm f 2 8 sl iis?

Here is what the site says about that.

From Voigtländer APO-Skopar 90mm f/2.8 SL IIs: Voigtländer APO-Skopar 90mm f/2.8 SL IIs: A prime lens by Voigtländer for Full frame cameras, 90mm f/2.8. Specs - Maker: Voigtländer - Focal length: 90mm (prime) - Maximum aperture: f/2.8 - Made for: Full frame sensors - Mounts: Nikon F - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Nikon F): as marked, 90mm. - On APS-C (Nikon F): like 135mm on full frame; f/2.8 gives about the depth ...

From Voigtländer Color-Skopar 28mm f/2.8 Aspherical SL IIs: Voigtländer Color-Skopar 28mm f/2.8 Aspherical SL IIs: A prime lens by Voigtländer for Full frame cameras, 28mm f/2.8.

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