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  1. Galleries
  2. »
  3. Astrophotography
  4. » Pleiades (with Pentax and his astrotracer)

 
Pleiades (with Pentax and his astrotracer)...

Norvegia 2023

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Pleiades (with Pentax and his astrotracer) sent on January 10, 2023 (18:43) by Juza. 33 comments, 5729 views. [retina]

at 140mm, Posa B f/4.0, ISO 800, tripod.

Anche se questa foto non è neppure lontanamente vicina alla qualità delle astrofoto "professionali", penso sia un'interessante dimostrazione dell'astrotracer di Pentax - questa funzionalità replica (entro un certo limite) il lavoro di una montatura equatoriale, andando a muovere il sensore durante lo scatto per controbilanciare la rotazione terrestre e permettere di scattare astrofoto con tempi estremamente lunghi (fino a 10 minuti, anche se dipende da focale e inquadratura). Nel caso di questo scatto, si tratta di un'esposizione di 150", con focale 210mm equivalenti, e le stelle sono puntiformi - normalmente con una focale del genere e un tempo così lungo le stelle apparirebbero come striscie. Per chi vuole sperimentare qualche foto astronomica senza attrezzatura dedicata, l'astrotracer è un'affascinante funzionalità :-)



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127 persons like it: 1niko, Af61, Alan Ford, Albertopantellini, Albi, Albieri Sergio, Alcenero, Aldo Costa, Allmau, Andrea Biagiolini, Angelo68, Aringhe Blu, Aron76, AstroC, Augusto Cherchi, Beppe.castino, Buenavida, Calsifer, Cirillo Donelli, Cristiano34, Crowfast_ph, Dantes, Danysky, DiIulio75, Edecapitani, Eemac73, Elia De Feudis, Elisabeth Ardouin, Emilio Paolo, Enrico Maggi, Erravolo, Fabio F77, Fabio M, Fabio789, Fede79, Fescar, Flavio Bucciarelli, Franco B, Fucio7, Fulvio Gioria, Gabriele Netti, Gabriele Scetti, Gaetano Perego, Gaia Alessandro , Gift Of Faith, Giion, Giovanni e Davide, Giovanni Soligo, Giovaz, Giulio Orlando, Giuseppe Maiorana, Gundamrx91, H.Thom, Jack1984, Jack_98, Jacopo Maffei, Latino Rosario, Lauc, Leopoldo Lusa, Lince, Lorenzo902018, Luca Alessi, Luca Questa, Luca1, LucianoSerra.d, MacPorter, Marant, Marco Rebesco, Marcop, Mario2006, Maryas, Marzio Bambini, Matteo Venturelli, Matteobelletti, Matteo_86, Mauri67, Maxmontella, Mikael, Miloga, Mimmo Aquino, Mirko73, Mmc12, Mnardell, Momiziano, Motofoto, Naturman, Nino Rubino, Nordend4612, Odysseus, Oldclub, P.a.t 62, Panleo1, Paolo Lorenzon Bariviera, PBrugne, Photorick66, PietroCv, Pinitti, Planet Eric, Quota2000images, Realvit, Renni, Ric96, RiccardoGandi95, Rivilli Antonio, Roberto Degli Uomini, Robertopitt, S5pro, Salass67, Salvatopo, Sandro Zambon, Saverio Perrotta, Sergik, Sloweyes, Soriana, Stampedli, Star Trek, Stefania Saffioti, Stefano Marangoni, StefanoConti, Taglia67, TheBlackbird, Thom, Tortax, Valerio Rossato, Valpil58, Zanardo, Zinder


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avatarsenior
sent on January 10, 2023 (18:49) | This comment has been automatically translated (show/hide original)

Double congratulations: very much alive in @Juza for the excellent shot!
And for choosing to review a Pentax product, unlucky only for the absence of marketing but esteemed by many of us for years.
Good continuation of the journey!

avatarjunior
sent on January 10, 2023 (18:54) | This comment has been automatically translated (show/hide original)

Well 'bravo, as before try just not bad (focal length, a little' lower if it was 140 mm, but changes little).

avatarsenior
sent on January 10, 2023 (19:21) | This comment has been automatically translated (show/hide original)

Amazing, great functionality!!!

avatarjunior
sent on January 10, 2023 (19:21) | This comment has been automatically translated (show/hide original)

Thank you!
mac

avatarsenior
sent on January 10, 2023 (20:35) | This comment has been automatically translated (show/hide original)

It won't be anywhere near the quality of professional astrophotos but for me it's a great shot. The pleiades with that blue halo are of great charm. If we then think that you shot with a standard zoom.
Congratulations and good continuation of the journey.
Roberto

avatarjunior
sent on January 10, 2023 (21:57) | This comment has been automatically translated (show/hide original)

Crazy!! This is a feature I just didn't know!

avatarjunior
sent on January 11, 2023 (0:11) | This comment has been translated

Super nice!

avatarsenior
sent on January 11, 2023 (0:38) | This comment has been automatically translated (show/hide original)

Just beautiful, congratulations!
.... although I did not understand how this astrotracer works ....

avatarsupporter
sent on January 11, 2023 (9:16) | This comment has been automatically translated (show/hide original)

nice review,150 seconds is fantastic,maybe 50 is enough

avatarsenior
sent on January 11, 2023 (9:56) | This comment has been automatically translated (show/hide original)

@Mario2006 The Pentax K3 III, after the use of its own software, "physically" moves the sensor to follow the stars and therefore these remain punctiform

avatarsenior
sent on January 11, 2023 (15:56) | This comment has been automatically translated (show/hide original)

bravo Juza

avatarsenior
sent on January 11, 2023 (20:02) | This comment has been automatically translated (show/hide original)

So much stuff and hat
off I tried but with poor results alas
I hope places also a starry night with landscape

avatarsenior
sent on January 11, 2023 (20:12) | This comment has been automatically translated (show/hide original)

Interesting document anyway.
And thank you for the work you share every day.

Greetings Renato

avatarsupporter
sent on January 11, 2023 (20:25) | This comment has been automatically translated (show/hide original)

Quoto Robertopitt

avatarsupporter
sent on January 11, 2023 (20:56) | This comment has been automatically translated (show/hide original)

Truly a magnificent image... 8-)
Excellent function l' astrotracer... :-o

avatarjunior
sent on January 11, 2023 (21:22) | This comment has been automatically translated (show/hide original)

Very nice, not even I knew this feature

avatarjunior
sent on January 11, 2023 (22:53) | This comment has been automatically translated (show/hide original)

Beautiful in its simplicity. Congratulations on the shared work

avatarsenior
sent on January 11, 2023 (23:46) | This comment has been automatically translated (show/hide original)

Beautiful..... in the immensity! ;-)

avatarsenior
sent on January 12, 2023 (0:15) | This comment has been automatically translated (show/hide original)

@ Jacopo


@Mario2006 The Pentax K3 III, after the use of its software, "physically" moves the sensor to follow the stars and therefore these remain point-like

Move in the direction that rotates it? If so, by how much and how does it determine the direction of rotation?

avatarsenior
sent on January 12, 2023 (6:59) | This comment has been automatically translated (show/hide original)

The sensor moves on the X-Y plane (and I believe it also rotates on other axes but it should not be a very relevant degree of freedom in this case). Take a first "calibration" photo, with the fixed sensor. From this deduces the trajectory to be made to the sensor in the final shot to keep the stars fixed.


RCE Foto

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