photoni Posted February 26, 2023 Share Posted February 26, 2023 30 km from home I am lucky enough to have the largest lake in Italy, I can get there with my electric Smart (it has only 140km range) In this season with few tourists :-))) and a sunny day allows you to take a relaxing walk. If you stop at the car park (free in winter) and go south you will find a beach of sand and pebbles for 3 km, if you go north you pass by the village with the medieval castle and then a long 10 km walk which ends at the next two villages. Yesterday I only brought the old A7 with QB39 1.5mm filter (~BG39) - Hoya R72 IR filter - and a "creative" ZWB3 2mm (~UG5) . ZWB3 . . . ZWB3 - an old house in the town centre - with these UV + IR it looks surreal :) . Thanks Toni Link to comment
colinbm Posted February 26, 2023 Share Posted February 26, 2023 An excellent collection. Link to comment
Yves W Posted February 26, 2023 Share Posted February 26, 2023 beautiful and interesting Link to comment
Nate Posted February 27, 2023 Share Posted February 27, 2023 Very nice filter comparisons Toni Link to comment
Andrea B. Posted February 28, 2023 Share Posted February 28, 2023 Nice series, Toni. I always enjoy seeing locations in other countries. The promenade along the lake (3rd set with light & dark squares) is so lovely. The old house with the palm trees is a perfect subject for that ZWB3. Link to comment
Unscenerie Posted March 1, 2023 Share Posted March 1, 2023 I'm enjoying your experimentation with filter combos, Photoni. It seems that R72+QB39(BG39) narrows the color spectrum as opposed to using only R72 because the exposure time is pretty long in your description. However, the photo still looks like an IR photo (the contrast and foliage reflection is still there). How did you come up with this combo? ZWB3 is an interesting IR alternative. I'm especially intrigued by ZWB3+QB39.. Do you think there's any UV light left after putting on QB39? The look of the photo is pretty close to a UV look, yet, skin tones look bright (at least the guy on the left edge). Link to comment
photoni Posted March 2, 2023 Author Share Posted March 2, 2023 @Unscenerie I don't have a BG38, I use the QB39 to take VIS pictures The weird test in the third photo was to see and confirm if the 1.5mm thick QB39 (~BG39) filter had a lot of IR leakage. In fact, even stacked with R72 it lets some IR through. Stacked with ZWB3 (~UG5) it appears to cut 90% of IR, basically only cut red orange yellows, and let a lot of light through from green to UV. .... I believe :) Link to comment
lukaszgryglicki Posted March 2, 2023 Share Posted March 2, 2023 The problem usually is that cutting even 99.9% of IR still causes IR leaks 99.9% is only OD3... in my UV-B only setup when I tried to get *anything* with non-mono camera (D600 just full spectrum with bayer untouched) I was getting mainly IR leaks with my IV308 (Invisible vision UV-B filter) + Hoya U-340 4mm (only to block any IR leaks) stack even if my max IR leak seems to be 0.000000445 (this is absolute value not a percent) which is OD6.5! Only the monochrome sensort with quartz glass seem to have no IR leaks when registering in 300-330nm range under sunlight... Reference data: https://docs.google.com/spreadsheets/d/1y2XAs5Y12vt_tVL7wj4EZregpfbQ8yrxny7_OY7qyrY/edit#gid=0 Link to comment
photoni Posted March 2, 2023 Author Share Posted March 2, 2023 @lukaszgryglicki Yes, that's what I think, it's the result of real reading proportions of the "sensor + optics + filters" complex, no only curve of filters With your D600 FS the proportion of UV "read" is equal to or less than 0.000000445 of IR with your fantastic mono instead it is 10 or 100 times greater. Link to comment
Andy Perrin Posted March 2, 2023 Share Posted March 2, 2023 Really beautiful photos Photoni! Link to comment
photoni Posted March 3, 2023 Author Share Posted March 3, 2023 thanks all. two more elaborations R72 ZWB3 Link to comment
photoni Posted March 4, 2023 Author Share Posted March 4, 2023 I was asked about the thickness of the Tangsinuo filters in my possession. I had never measured them, the result is that they are "unique copies" the graphs provided on the web are for 2 mm thickness for all, the only filter currently sold with a thickness of 1.5 is the QB39 (a while ago I asked for a 2 or a 2.2 mm but it was not available) . Attention please ... the last image of Garda Lake, is processing with photoshop, I increased the saturation and contrast in different areas. Link to comment
photoni Posted March 11, 2023 Author Share Posted March 11, 2023 another walk on a sunny day with a lot of wind. Sony A7 fs + Meritar 50mm f2.9 Hoya R72 TSN575 + ZWB1 . R72 . TSN575 + ZWB1 . again Hoya R72 with the splendid bokeh swirl of the fully open Meritar . Thanks Toni Link to comment
colinbm Posted March 11, 2023 Share Posted March 11, 2023 Looks like a nice days outing. Link to comment
Nate Posted March 13, 2023 Share Posted March 13, 2023 Great shots Toni! Beautiful place for IR and UV Link to comment
photoni Posted February 28 Author Share Posted February 28 walking in Bardolino - Lake Garda, a few kilometers from Lazise. Sony A7 fs + Soligor KA 35 f3.5 UV = ZWB2 (2mm t) TSN575 (2mm t) - probably f 3.5 IR = Hoya R72 - probably f 8 . . . . . UV - creative movement . . O.T. bonus: film 135 in Agfa Isola medium format 6x6 - C41 developed with Rodinal (BW) . Link to comment
Unscenerie Posted February 29 Share Posted February 29 21 hours ago, photoni said: walking in Bardolino - Lake Garda, a few kilometers from Lazise. Sony A7 fs + Soligor KA 35 f3.5 UV = ZWB2 (2mm t) TSN575 (2mm t) - probably f 3.5 IR = Hoya R72 - probably f 8 . . . . . UV - creative movement . . O.T. bonus: film 135 in Agfa Isola medium format 6x6 - C41 developed with Rodinal (BW) . I really like the first set of the photos ... the atmosphere, like two 2 different emotions Link to comment
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