Archive for the ‘Comparative’ Category

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Multipost

July 26, 2008

 

Have had a couple issues on hold for a few days, they are coming all togheter today in a multipost..

 

Defective Hoya R72 Infrared filter

The Ricoh compacts are legendary for it´s IR capabilities. I once had a IR converted 20D. It was fun, but I thought that having a camera for IR shooting exclusiveley was not worth it so I sold it. Have missed IR a lot. Now with the arrival of my GX100 it´s the perfect moment to get back to some IR shooting. The R72 is probably the most popular IR filter, because it allows not only B&W IR but also allows to produce great “False Colour” images. So I went and bought an Hoya R72 IR filter from a reputable dealer on Ebay on the states to a great price. The IR filter arrived last week and since then I have been trying it out with very weird results. I have not been pleased with it at all. I blamed my lack of IR skills and went to read some tutorials and tryed it out some more, but still no success. Suddenly, after watching some of the pictures I noticed that one portion of the filter was producing a blur. If you rotate the filter the blur rotates with it. Funny that the surface of the filter is flawless, not a single sign of damage.

You can see the blur caused in the area surounded by the red elipse. Not being able to see any damage signs I decided to have a look against a strong light source and..there it was!! The filter has an internal scratch that is clearly underneath the coating:

I have contacted the dealer and after providing some pictures they were very surprised becaused aparently after many years representing HOYA filters they have never seen anything similar. To be honest neither have I..They inmediately took care of the issue and kindly asked for me to return the filter so they can proceed to inspection and replacement. They have taken care of the return shipping costs, something not very common I believe. So my IR photography is on hold untill I receive my replacement filter..Oh well!

 

Panasonic LX2 VS. Ricoh GX100

This is probably useless as both replacement models (GX200 and LX3) have been announced, but I wanted to see a few things with my own eyes..So I went and shot a scene with both cameras to see the real world differences. You can click on the images to view (and download if you wish and could be of any interest to you) a bigger version.

Panasonic LX2, f5.6, 0.625Sec, 6.3mm, ISO 100

 

Ricoh GX100, f5.4, 0.625Sec, 6mm, ISO 80

Ricoh GX100, f5.4, 0.625Sec, 6mm, ISO 80

 Considering the differences inherent to this two cameras(the panasonic is a 16:9 native sensor camera with a 28mm lens and the Ricoh is a 4:3 native sensor one with a 24mm lens.) this is what I decided to do: Shot both cameras at 3:2 aspect ratio. the LX2 at it´s widest zoom setting and the Ricoh at 28mm. This is going to give the most similar output, in pixel size and FOV. I shot both cameras in their lowest ISO setting, 100 for the Panny and 80 for the Ricoh. All other setting are standard in both models. Both lenses stopped down to 5.4/5.6, which should be close to their sweet spot. Both cameras shot with self-timer, sitting on the table and with image stabilisation turned off. Both in auto focus. This is not a high ISO comparative study, I thought it would be of more interest to see both cameras at their native ISO and in JPEG in order to see the different noise strategies both machines have. Two things are evident this far:

  1. The Ricoh has a much more effective auto white balance that as I mentioned in a previous entry “nails” it every time even in mixed/difficult conditions. I am really liking the Ricoh colours. The Pany´s Auto WB can be all around the place, but it gets much better if you use the specific white balance output. Obviously all this is irrelevant for a RAW shooter..
  2. The Ricoh has a slightly wider FOV (with the 28mm setting in 3:2) , but nothing really relevant .

I thought this high contrast image could be a good candidate, plus it´s all I was willing to shoot last night..Next you will find 100% crops from both cameras in two different areas of the image.

Panasonic LX2, crop1

Panasonic LX2, crop1

 

Ricoh GX100, crop1

Ricoh GX100, crop1

 

 

LX2, crop2

Panasonic LX2, crop2

 

Ricoh GX100, crop2

Ricoh GX100, crop2

Just in case you believe an ISO100 image of the GX100 could be of interest or a more fair comparisson, here I enclose a ISO 100 crop of the most relevant portion of the image, the shadowed area where noise and the processor´s job are going to be more critical.

 

Ricoh GX100, crop2 @ ISO100

Ricoh GX100, crop2 @ ISO100

There seems to be, at least to my eyes, a slight difference in noise between the ISO 80 & 100 files of the GX100. I encourage you to see and download bigger versions of each file. I believe this images pretty much tell the story about noise, noise reduction and smearing..I believe commenting about sharpness is dificult. Both lenses are plenty sharp and capable of resolving great detail, though the Leica lens seems a tad sharper (and seems to suffer from a bit more CA). This conclution is not scientific though..I am starting to have a clear idea of how the output of each machine is but I would like you to reach your own conclutions, and It would be of most interest to have them shared here..

 

Two GX100 images from today

 

Sometimes it´s difficult to believe..

Ricoh GX100, f2.5, 1/5Sec, 5,1mm, ISO400, B&W JPEG Processed in PS

Ricoh GX100, f2.5, 1/5, 5,1mm, ISO400, B&W JPEG Processed in PS

 

Highkey “Micromachines”

Ricoh GX100, f2.5, 1/760, 5,1mm, ISO400, B&W JPEG Processed in PS

Ricoh GX100, f2.5, 1/760, 5,1mm, ISO400, B&W JPEG Processed in PS

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