Hello Walter, If I am reading between the lines properly, you shot with the Vivitar for both shots, both using the Vivitar Auto exposure leaving the camera settings the same.
To shoot a vertical shot with the Vivitar you would then need a bracket for either lightsphere or Lumiquest, I take it. What was the approximate distance to subject? Any estimate on light loss due to the light modifier? -- Best regards, Bruce Tuesday, June 17, 2008, 5:40:25 PM, you wrote: WH> Paul's thread got me to thinking. I have a Lightsphere, the cloudy WH> looking version. I have tried it on the Sigma 500 flash with poor WH> results that I attribute to P-TTL. May be wrong. WH> Anyway, today I purchased a Vivitar 283 and put the velcro on it to WH> attach my Lumiquest bounce hood. The initial tests reminded my again WH> why I liked the Vivitar and Sunpak flash units with the simple auto WH> feature. WH> Then I decided to see how the Lightsphere would react. Not bad, but WH> there are some subtle differences between the two. The attached WH> photo's show. I believe each is captioned to show which was which. WH> Walt WH> http://walthamler.smugmug.com/gallery/4592986_mrB5J#315094136_KwVvH-XL-LB WH> http://walthamler.smugmug.com/gallery/4592986_mrB5J#315094132_wiZxw-XL-LB -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.

