The Sony 50mm f1.8 is one of their cheapest lenses, meant to give shooters a taste of what it's like to shoot with a fast prime on a lighter budget with a very classic style of rendering. This lens has a cheap plastic construction and a clunky autofocus system but it is very small and very lightweight making it a great walk-around lens. There are a lot of technical issues but with the 6 element design, the lens produces some absolutely wonderful images with a more retro vibe.
The Helios lenses have really grown in popularity over the last few years for their classic rendering and crazy swirling bokeh. But are they really any good? With all the awesome new third-party lenses out of China or Japan, the Helios lenses no longer get as much attention as they used to, but they're still fun lenses to shoot with if you can get a good copy.
The TTArtisan 50mm f1.2 is a fairly compact, all manual APS-C lens for those seeking a good but affordable 50mm that doesn't sacrifice performance for a bright f1.2 aperture. We haven't really had a lot of great options in this price range with this fast of an aperture until now. With great performance and a lot of Pros but only a few Cons, this lens ends up being one of the better options in the under $150 price range.
This lens is very interesting and fun for the price. I found it doesn't perform great with regards to flaring and shooting into the sun when compared to the Rokinon 12mm that costs more than twice as much ( so not amazing for landscape work ), but this Pergear lens does have some nice sun star effects which could make it a bit more interesting to use for night cityscapes where lighting conditions aren't as harsh.
The Pergear 35mm f1.2 is a compact APS-C lens designed with a bright aperture for a very shallow depth of field and low light shooting. When looking at character and performance, this lens is packed with beautiful imperfections, as well as the regular kind. With the limitations in mind, it can produce some nice results and it can be a lot of fun in the right situations.