Black/white-spotted Curculionoidea, La Isla Escondida, Colombia

In the Cholini tribe.

comments (12)

Claude CHAVAND

Lion

Nice shots !
This weevil could reasonably be classified in the Molytinae subfamily, tribe of Cholini.
Posted 6 months ago, modified 6 months ago
1. Ferdy Christant
  
  Lion
  
  Thanks so much, added the tribe name to the description. Posted 6 months ago

Claude CHAVAND

Lion

One question Ferdy :
How do you to manage to focus in such low light conditions with a reflex camera ?
Do you use additional lights ? Posted 6 months ago
1. Ferdy Christant
  
  Lion
  
  This was a daytime shot (even though the background looks dark) so there was enough light to focus. But not that much, even by day the forest is dark to a camera's viewfinder/sensor.
  
  I did not use a focus light in this case, but I do have a headlight attached to my flash which when enabled shines into the back of my diffuser, giving a weak focus light. Posted 6 months ago

Claude CHAVAND

Lion

Thank you for these details.
I always have problems for focusing when shooting insects in forest. The diaphram needs to be closed to apertures greater than 10 (to get enough depth of field) and it's too dark for manual focus !
For sure my next camera will be hybrid...
Posted 6 months ago
1. Ferdy Christant
  
  Lion
  
  So you have a lens that closes the aperture during focusing? That is painful. My 1:1 and 2:1 lenses do not do this, but my 5:1 does. Posted 6 months ago

Claude CHAVAND

Lion

You mean to say it has nothing to see with the reflex technology ?
I take all my photos with the priority set to "aperture" and yes the diagram position remains the same, it depends on my initial setting only (Sony FE 90mm F2.8 Macro G OSS).
I'll check if there is another way to avoid that. Posted 6 months ago
1. Ferdy Christant
  
  Lion
  
  Normally, what you see in a viewfinder is the largest aperture your lens supports, so f/2.8 in your case. Even if you set the aperture to f/10, the viewfinder should still show it at f/2.8. Because otherwise indeed the viewfinder would be too dark to focus.
  
  On some/most cameras you can choose to enable/disable aperture previewing in the viewfinder.
  
  It is of course possible to be in a scene where it's so dark that not even f/2.8 gives a bright enough viewfinder. In that case you may need a focus light.
  
  There are lenses where the above is not true. These lenses have no electronic aperture control. In that case, f/10 really is f/10, also in the viewfinder. But these lenses are quite exceptional (thankfully). Posted 6 months ago

Claude CHAVAND

Lion

Well, it looks like that most of time the light is too weak in the forest. But it is still unclear to me about how my lens operates. I can see the display darkening when I close the diaphram which is not logic if the diaphragm would remain open to 2.8 before the shot... Posted 6 months ago
1. Ferdy Christant
  
  Lion
  
  Indeed. Based on your description I think one of the following is going on:
  - you have aperture preview enabled in the viewfinder
  - or, less likely, your lens has no aperture communication with the camera Posted 6 months ago

Claude CHAVAND

Lion

My lens is full automated and my camera is also Sony (A7). I have checked the depth of field is continually following the diaphragm value, it is designed like that on purpose !
No way to disable this logic, I have to deal with it.
I have increased the sensitivity of the view finder to improve a little bit the nightmare... Posted 6 months ago
1. Ferdy Christant
  
  Lion
  
  That is really surprising! I don't have a mirror-less camera so can't test anything, but it sounds like that makes macro photography quite difficult without additional lights. Posted 6 months ago

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By Ferdy Christant

Uploaded Feb 21, 2025. Captured Oct 8, 2024 14:37 in MW4H+G7 Orito, Putumayo, Colombia.

Explore Colombia 8,334 2,805 0

NIKON D850
f/16.0
1/250s
ISO100
105mm

Captured in the fall. More fall photos.