13 個留言

1. 
   lomodesbro · 2021-08-11 20:57

   yes

2. 
   rolling-grey · 2021-08-11 23:24

   @lomodesbro thanks

3. 
   scout2017 · 2021-08-12 09:07

   Fantastic!

4. 
   brine · 2021-08-12 12:40

   Fantastic!!!

5. 
   rolling-grey · 2021-08-12 15:05

   @scout2017 Thank you. After Hurricane Harvey the foundation of the RR bridge was compromised with the 100 year flood. Thus the new foundations. Unsightly but should hold up for awhile.

6. 
   rolling-grey · 2021-08-12 15:06

   @brine @brine @brine @brine @brine thanks much.

7. 
   brine · 2021-08-12 17:25

   @rolling-grey My pleasure!!!

8. 
   stereograph · 2021-08-30 18:59

   Amazing shot!

9. 
   stereograph · 2021-08-30 19:00

   It looks very IR! Thats a big plus! and the clouds coming great!

10. 
    rolling-grey · 2021-08-31 16:20

    @stereograph Thanks. I am experimenting with the Rollei 400 film. It extends into the IR range and using a HR72 filter gives an IR image. I have been splitting the exposure, not on this photo it is full IR, by determining the pinhole exposure and splitting it in half. I want to get more detail because the full IR exposure is lacking some detail. Let's say the exposure is 2 sec. To split I will expose for 1 sec. without the filter then close the shutter and put on the HR 72 filter. This filter has an EV of 16 and the film reciprocity correction has a P factor of 1.52. So for the remaining second you calculate (1sec to the power of 1.52)X16 = 45 seconds then divide by 2 which gives you an exposure of 23 seconds.

11. 
    stereograph · 2021-08-31 17:54

    @rolling-grey Thank you so much for the details! amazing work!

12. 
    rolling-grey · 2021-08-31 18:48

    @stereograph :)

13. 
    rolling-grey · 2022-04-11 21:00

    @rolling-grey @rolling-grey Thank you. I use Rollei 400IR. Split the metered exposure in half. With first half taken with no 720nm filter and second half with the filter. Predetermined reciprocity in a spreadsheet table. Cuts down on time of exposure also.