Butterfly

[rpcrowe]

100-400mm f/4.5-5.6L IS II Lens on 7D camera...

[bnnrcn]

Beautiful image with lovely colors.The butterfly looks so sharp and clear

[rpcrowe]

A few more...
1.
These brown butterflies were attracted to the adobe colored wall...

2.

3.

4.

5.


All these images shot with Canon 7D camera using a 100-400mm f/4.5-5.6L IS II lens and fill flash...

[DanK]

nice shots, particularly those that you got from the side. That seems to be a very close-focusing telephoto. I want one.

[Shadowman]

100-400mm f/4.5-5.6L IS II Lens on 7D camera...

Nice shadow pattern and composition.

[Shadowman]

A few more...
1.
These brown butterflies were attracted to the adobe colored wall...

2.

3.

4.

5.


All these images shot with Canon 7D camera using a 100-400mm f/4.5-5.6L IS II lens and fill flash...

Nice follow ups.

[rpcrowe]

I brought my 90mm macro lens but. actually needed a longer lens because so many prople were crowding the closest butterflies that it was easier to shoot over them (it's good to be tall).

I also brought my extension tube but, really didn't need it.

The first image I posted was shot at 349mm on a 7D which is a 1.6 crop camera. I used ISO 320 with 1/250 second shutter speed priority.

The rest were also shot using the 7D:

1: 100mm
2: 400mm
3: 248mm
4: 400mm
5: 400mm

[Dave Humphries]

Good examples Richard,

Personally I prefer more 'natural' and less 'fill' (flash) light, but the lens looks good and the flash must help with 'freezing the subject', some of which incessantly flap even when perched.

Over the years, I have also been forced in to shooting the further away ones with a long lens as a strategy.

As a matter of interest, what is the minimum focus distance?
No wait, I can look that up as we know the lens used ....

Seems it is 0.98m (a bit over 3 feet) - that is closer than I'd have expected for a 100-400mm.
Magnification is 0.31x at 400mm (on FF body I assume - so you'll gain a bit there too, making it about 0.5, if my calculations are correct)

Cheers, Dave

[Sam W]

Nice shots, I like the brown butterfly best.

[DanK]

Seems it is 0.98m (a bit over 3 feet) - that is closer than I'd have expected for a 100-400mm.
Magnification is 0.31x at 400mm (on FF body I assume - so you'll gain a bit there too, making it about 0.5, if my calculations are correct)

No, there is no effect of sensor size on magnification, which refers to the ratio of subject size to the size of the image on the sensor.

This confusion often arises because people intuitively think in terms of the size of the image relative to the framing imposed by the sensor. At minimum focusing distance, the butterfly will fill more of the frame on the crop sensor camera. This is not a function of magnification, however; it is just that the crop sensor removes material from all edges.

To avoid confusion, many people use "reach" to refer to the advantage of a crop sensor camera with respect to filling its frame.

For macro work, I think a key issue is the number of pixels on the image at minimum working distance. For that criterion, the key is pixel density. I use a 7D rather than my 5DIII for bug shots partly for this reason. (It is also a bit smaller and lighter, and none of the bells and whistles on the 5DIII are of much use in bug hunting anyway.)