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  4. » Aricia agestis

 
Aricia agestis...

Farfalle - Licenidi 1

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Aricia agestis sent on April 22, 2024 (17:34) by Pangur Bán. 13 comments, 241 views.

, 1/8 f/2.8, ISO 400, tripod.

Aprile 2024. Focus stacking di 56 scatti.



View High Resolution 1.7 MP  



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avatarsenior
sent on May 12, 2024 (19:01) | This comment has been automatically translated (show/hide original)

I'll ask you a question: do you do the FS starting from the farthest or closest point of the subject?
I'm asking you this because I think I'll get better results starting from the farthest point and with very wide apertures (f8, F9) in order to reduce that fogging effect that is created between the micro hair or similar.
But I'm not sure yet
Giò

avatarsupporter
sent on May 12, 2024 (20:09)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

Click here to translate the comment in English [en]


Quasi sempre dal punto più vicino che qui sono le antenne che sporgono in avanti. Se cambia qualcosa facendo il contrario non te lo so dire ma non credo. Non lo so in realtà. Bisognerebbe fare prove eseguendo lo stesso FS dal punto a fuoco più vicino a quello più lontano e viceversa.

Non sono granché soddisfatto di questa foto. Ho usato un RR estremo (5x) in condizioni di luce e vento non farevoli e non avrei dovuto, così poi per rendere buono il risultato sono stato costretto ad abbattere la risoluzione. Tanto valeva usare un RR più basso e ridurre di meno i MP.

Riguardo ai diaframmi, di norma li uso molto aperti, se non apertissimi (f2.8, f4) quando eseguo molti scatti con RR alti come appunto 5:1 o 4:1. Se però mi devo sbrigare perché il soggetto o la situazione non mi concedono tempo, allora pochi scatti con diaframmi chiusi per avere più profondità di campo. A volte va bene anche così, altre no. Dipende dalla forma del soggetto.



avatarsenior
sent on May 12, 2024 (23:24) | This comment has been automatically translated (show/hide original)

Glad you understood me, try with a central aperture(8-11,),start from the farthest point and then let me know. At home everything is 99% fine but in the field I haven't been able to test it yet. Certainly at f 16.18 it doesn't go very well

avatarsupporter
sent on May 13, 2024 (11:08) | This comment has been automatically translated (show/hide original)

Today I did several tests with a hairy beetle (I didn't find any butterflies), but with magnifications no higher than 2x because the laba was cloudy and there was very little light. Using high RRs and at the same time closing the aperture a lot meant raising the ISO excessively. Shutter speeds can be extended, but only up to a certain point.
The flash in these cases solves the light problem, but I mostly use it when it comes to taking single shots with very small apertures, fast shutter speeds and high RR to moving subjects. For example, the Salticidae belonging to the smallest and most restless species, tiny ants or even worse, the very fast mites.
Anyway, tonight I'll see how it went.

avatarsenior
sent on May 13, 2024 (21:50) | This comment has been automatically translated (show/hide original)

Great, tomorrow, if the weather allows I'll do the first outing with the new mirror less equipment

avatarsupporter
sent on May 14, 2024 (14:50)


This comment is too long to be automatically translated, so it will be shown in its original language (Italian)  

Click here to translate the comment in English [en]


Le prove che ho fatto non hanno mostrato differenze sia procedendo in avanti che all'indietro con la slitta. Riguardo invece al diaframma, a parità (o quasi) di numero di scatti, quello più aperto ha dato un risultato più nitido rispetto a quello chiuso. Se ciò è già evidente con RR 1,5-2:1, cioè quelli che ho usato, non può che esserlo anche con RR superiori. Nulla che mi sorprenda in realtà, perché le guide al focus stacking di solito consigliano di aumentare l'apertura del diaframma e il numero di scatti man mano che si sale con l'ingrandimento. Esistono anche delle tabelle che indicano dei range di valori da impostare, ma generalmente io mi adatto alla luce che ho a disposizione.

Un paio di ritagli di due coppie di FS a confronto (nessuna postproduzione, idem per i successivi ritagli):

postimg.cc/ZW07v6zr

(a sinistra la sequenza a marcia indietro)

postimg.cc/pm70fyP3

(a destra la sequenza a marcia indietro)

Nel primo caso io vedo una differenza non nettissima ma certamente presente tra i due FS, con f5.6 ISO 1600 che vince su f9 ISO 3200. Nel secondo caso non noto niente di particolare.

Altri due FS a confronto:

postimg.cc/k6PfHZ6c

(a destra la sequenza a marcia indietro)

Anche qui secondo me il diaframma più aperto ha dato un risultato migliore. Beninteso che con la postproduzione il FS a destra può guadagnare la stessa nitidezza.

In seguito ho cambiato obiettivo e sono passato al RR 4:1 ma con diaframma fisso f2.8. Se avessi usato f8 per un confronto, avrei dovuto alzare moltissimo gli ISO e sarebbe stato penalizzante.

postimg.cc/JtqPTp1N

(RR 4x, f2.8)

Il FS migliore è quello a destra. In parte presumo sia dovuto al valore degli ISO, ma quando si usa una slitta manuale il risultato dipende soprattutto dall'abilità del fotografo che può eseguire più o meno bene le sequenze di scatti. In più c'erano casuali folate di vento a sommarsi alle variabili.

"E poi si è messo a piovere" (per davvero)

e non avevo più tempo perché stava salendo il sole.





:D


avatarsenior
sent on May 15, 2024 (15:15) | This comment has been automatically translated (show/hide original)

Thank you, you have been crystal clear. This morning I went to a place full of dead branches and, not being able to place the 3 foot I opted for the flash, but on the Sony I still struggle to manage it, but I posted a nice photo
Gio

avatarsupporter
sent on May 15, 2024 (17:09) | This comment has been automatically translated (show/hide original)

I've only been using the flash at home for a while, both for single shots and for not too long stacking. I tend not to carry it around with me, focusing more on fast shutter speeds (and consequent high ISO) in handheld shots.
In fact, I have very little experience with flash used in natural daylight. I should do a few more attempts, since although I have managed to build a good speaker, for me it remains a rather mysterious object. ^_^

avatarsenior
sent on May 16, 2024 (7:33) | This comment has been automatically translated (show/hide original)

If you want I'll send you a picture when it's placed on the self-made handle.

avatarsupporter
sent on May 16, 2024 (14:20) | This comment has been automatically translated (show/hide original)

My flashes with their self-made diffusers are these:
[IMG]https://i.imgur.com/jz7teg5.jpg[/img
]


In addition to the domes, I alternately use tracing paper disks and Godox filter plates that I insert inside the tubes. The diffusion achieved is satisfactory, the light is much less harsh with these accrocchi.
if you want I'll send you a picture when it's placed on the self-made handle.
Thank you, but I am afraid that the flash issue is postponed for the time being. Today the 80D's shutter has abandoned me after about 220,000 shots of intensive use in just two years. Tomorrow I'll take it to the lab in the hope that it's a software problem, but I doubt it.

avatarsupporter
sent on May 17, 2024 (13:15) | This comment has been automatically translated (show/hide original)

Quick update: yes, the shutter is completely gone and the mirror malfunctions as well. Some time ago I used to joke that it would collapse like the Blues Brothers' machine and it happened. :-or I thought I would retire her still functioning at the end of the summer and instead she wanted to fall in the line of duty. ^_^
I won't have it repaired, the laboratory warranty is only 6 months, it would cost me about 300 euros (an estimate, I didn't want an official estimate otherwise I would have had to pay for it) and the wear and tear of all the other components would remain. I prefer to buy it back in the used one spending a little more and have a "new" car that battles for another two years.



avatarsenior
sent on May 17, 2024 (17:06) | This comment has been automatically translated (show/hide original)

Come on, throw yourself into the modern world.

avatarsupporter
sent on May 17, 2024 (17:43) | This comment has been automatically translated (show/hide original)

Maybe later. I was tempted by the R7, but for the moment I will opt for a conservative choice. I still can't get enough of the 80D. :)


RCE Foto

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