mcherdering posted a reply:
I have both lenses. The Pentax 10-17 Fisheye is a fun lens, but can introduce quite a bit of distortion above and below the horizontal centerline, when held normally. However it has a 180 degree field of view that is great when needed.
The Sigma has much less distortion, but only about a 90 degree field of view. The Sigma has much less CA (purple fringing) as well.
Both are nice lenses, when used appropriately.
garnering of tests shot with an sgpro, dvx100a and zeiss and pentax lenses. 20mm and 35mm zeiss. 50mm pentax.
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We'll watch over that, thanks Sydney Morning Herald, Australia - We tease handled fine DSLRs from Olympus, Pentax, Canon and others, but as nobility as they are - and they are generally very eulogistic indeed - we have not been |
07.01.09 - Due nuove Optio da Pentax FotoUp.net, Italy - La prima si chiama Optio P70 ed è una fotocamera da 12 megapixel dal conception ultracompatto come testimoniano i soli 20mm di spessore che riescono però |
PMA 2009: cosa aspettarsi secondo 1001NoisyCameras Clickblog.it, Italy - Oltre a queste potete trovare molte altre speculazioni sui modelli che potrebbero essere proposti da Casio, Olympus, Pentax, Ricoh e Samsung. |
Lumix G1: Gewogen und für leicht befunden ORF.at, Austria - So sind die Größenunterschiede zwischen einer Four-Thirds-Kamera und kompakten Modellen von Nikon, Canon und Pentax vernachlässigbar. |
 新浪网 | 光学巨匠开启数码新纪元理光影像之路回眸 新浪网, China - 在M42螺口时代理光曾经出品过世界上唯一的一部快门优先自动暴光相机“Auto TLS EE”，该机和Pentax 的ES/ESII 遥遥相对。到了1975年之后的理光镜头使用的K 口时代也曾经 |
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pentax k10d/carl zeiss jena flektogon 2.8/20mm