You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> Film Astrophotography Previous   Index   Next   Threaded   Pages: 1 AstroBobo sage Reged: 07/04/07 Posts: 395 Loc: Zagreb, Croatia Fuji Provia 400X test       #1986448 - 11/15/07 03:26 AM Attachment (89 downloads) Edit   Reply   Quote Quick Reply   Hello all, A few days ago I found a 5-pack of Fuji Provia 400X in the camera store I usually buy films. The 400X is a new emulsion which replaced 400F. I was interested to see if the spectral response would still be good enough for h-alpha nebulas. Two days ago the skies cleared so I had the opportity to test the film. My targets were comet Holmes and M42. I use a Pentax 6x7 medium format camera. Comet Holmes was captured wide field with a 150mm lens and M42 with my Pentax 105 SDP apo refractor. Here's a crop of M42, 40-min exposure. Scanned with Epson V700 and a bit of curves adjustment after scanning. I'm quite pleased with the result. The grain is very fine (this photo is 25% of the original scanned size) and a lot of the nebula was captured. Unfortunately I did not manage to make a direct comparison with the older emulsion but I'm very satisfied with the new one. I still have some 15-20 rolls of 400F in my fridge though -------------------- Boris Stromar : AD Infinitum member : Zagreb, Croatia, Europe P75SDHF : P105SDP : MN71 : CGE : STL-11000 http://www.astrobobo.net Post Extras:       ZachK professor emeritus Reged: 08/21/05 Posts: 667 Loc: Israel Re: Fuji Provia 400X test [Re: AstroBobo]       #1986473 - 11/15/07 03:52 AM Edit   Reply   Quote Quick Reply   Good to know, I still have some 400F in both 35mm and 120. Now if I could only get 400x in 4x5 (they don't make it) -------------------- Zach Kessin Yesha Israel Meade ETX 127 Mak-Cass 15x70 Celestron Skymaster Binoculars Sinar F 4x5 view camera Rolliflex Camera 80mm F2.8 Pentax K-1000 Camera 35,50 and 60--300mm zoom 3 kids, Large cat, small dog Post Extras:       ClownFish Post Laureate Reged: 04/26/05 Posts: 5600 Loc: Islamabad, Pakistan Re: Fuji Provia 400X test [Re: ZachK]       #1986538 - 11/15/07 05:01 AM Edit   Reply   Quote Quick Reply   Looks good - if maybe a bit on the violet side. The blues really came out -0 you need to shoot M45 now! I think perhaps the 400X shifts the red compared to 400F. For a test, I think one of each of these will show the real effect of the emulsions. 1. REDS: M8 - Lagoon nebula 2. BLUES: M45 - Pleiades 3. YELLOWS: Area around Antares CF -------------------- Learn all about POLAR ALIGNMENT with my Drift Method Tutorial and simulator!! Or visit my Foreign Service Blog! Post Extras:       AstroBobo sage Reged: 07/04/07 Posts: 395 Loc: Zagreb, Croatia Re: Fuji Provia 400X test [Re: ClownFish]       #1986560 - 11/15/07 05:39 AM Edit   Reply   Quote Quick Reply   Good suggestions, thanks Clownfish! Next time I'll try M45 nad perhaps I'll manage it with 400F for comparison. -------------------- Boris Stromar : AD Infinitum member : Zagreb, Croatia, Europe P75SDHF : P105SDP : MN71 : CGE : STL-11000 http://www.astrobobo.net Post Extras:       Nightfly super member Reged: 06/20/07 Posts: 199 Loc: Sullivan, Maine Re: Fuji Provia 400X test [Re: AstroBobo]       #1988109 - 11/15/07 08:59 PM Edit   Reply   Quote Quick Reply   Boris, Very good. Perhaps 400X will become an optional film, especially where blue response is a consideration. I will be running a roll of 400X through on the next dark run. I would like to see your 150mm shot of Holmes. Jim -------------------- Jim Cormier Sullivan, Maine, USA www.nightfly.zoomshare.com Pentax 67 with 55, 105, 165, and 300mm lenses Post Extras:       AstroBobo sage Reged: 07/04/07 Posts: 395 Loc: Zagreb, Croatia Re: Fuji Provia 400X test [Re: Nightfly]       #1988607 - 11/16/07 02:56 AM Edit   Reply   Quote Quick Reply   of course, I'll post it as soon as I can -------------------- Boris Stromar : AD Infinitum member : Zagreb, Croatia, Europe P75SDHF : P105SDP : MN71 : CGE : STL-11000 http://www.astrobobo.net Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 0 registered and 1 anonymous users are browsing this forum. 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