alberto_b

alberto_b

Lives in Italy Lecco, Italy
Works as a journalist
Has a website at www.albertob.eu
Joined on Dec 28, 2005
About me:

journalist, born 1961
First pictures with 42x1 lenses on old Edixa body. SInce 1978 Pentax user, beginning with 42x1 adatper and some Takumars. MX and ME, Me Super, Super Program (Super A), LX, SFX-N, Z1 (PZ1), DS, K20D, K-r, now K-70. First digital camera was a 2004 Canon A80, followed by IS640 and IS650.
Then Lumix LX3 and LX7, the latter being by far the most used camera now.
Tried a Lumix FZ1000 but sold it after 10 months.

Comments

Total: 76, showing: 1 – 20
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On article Pentax K-3 Mark III initial review (877 comments in total)
In reply to:

NexUser: Fuji's 26MP has worse high ISO performance than 24MP yet Pentax says this 26MP has better high ISO then K3II.
Or maybe K3 III has more pre-cooked NR baked into RAW like K1 II?

K3II was worse than K70 which was worse than KP. So I hope KP is worse than K3 III :)

Link | Posted on Mar 31, 2021 at 22:01 UTC
On photo Great crested grebe in the A big year - birds 2020 challenge (2 comments in total)
In reply to:

grafli: Did you sneek out of quarantine to take the picture?

A couple of days before the most restrictive lockdown. Going there by feet anyway. :)

Link | Posted on May 2, 2020 at 10:58 UTC
In reply to:

By standing on the Shoulders of Giants: This photo is so interesting, I Googled to see what other pictures look like at night. I'd suggest others Google it too. Regards

I think the blue light comes from very old mercury-vapor lamps, it's illegal to sell them in European Union since 2006. The yellow-orange from standard sodium vapor lamps.

Link | Posted on May 28, 2019 at 09:32 UTC

I have the 15 mm and since then I no more trust in Irix build quality. Look at my User review with test images on dpreview titled
"Weird OOF spot in (all?) Irix 15 including dpreview's"

Three defective copies on three in my experience, with a "moving" OOF area depending on turning CW or CCW the focus ring.

Link | Posted on Jan 3, 2019 at 10:23 UTC as 5th comment
On a photo in the Irix 15mm F2.4 Real World Sample Images sample gallery (1 comment in total)

Clearly defective like the 2 copies I tried, there is a spot of field curvature in the center-right part of the image. In my experience, the spot is not always in the same position, depending on the direction of the focus barrel was moved before focusing. Probably the inner lens go randomly off-axis due to excessive play in the movement. In other full aperture samples in this gallery the defect - always in the center-right - is less evident.

Link | Posted on Dec 13, 2018 at 07:50 UTC as 1st comment
On photo A smile is worth a thousand words in the Fill the frame challenge (6 comments in total)
In reply to:

MannyZero: Ah...
Good old LUMIX LX7 in the right hands...
This will make a great poster for the Dental Clinic of my nephew.

Some tooth whitening needed... :)

Link | Posted on Sep 26, 2018 at 15:41 UTC
On photo A smile is worth a thousand words in the Fill the frame challenge (6 comments in total)
In reply to:

ed rader: fantastic. love it!

Thank you Ed.

Link | Posted on Sep 24, 2018 at 22:58 UTC
On photo A smile is worth a thousand words in the Fill the frame challenge (6 comments in total)
In reply to:

HQ: Rightfull winner!
Greetz from the contestant who ended 22th :-)

Thank you. I like your flamingo - different lenels give a pleasant 3D effect to the image.

Link | Posted on Sep 24, 2018 at 22:56 UTC
In reply to:

eenymac: I'd have thought that the lack of movement on the part of the Anteater,in what seems to be a long exposure, would have raised at least some curiosity?

Roland explaination is right, but I think in the RAW file you would still find some little trace left from the movement of the anteater. The farthest part of background doesn't look totally black, so I'd expect to find some - almost invisible with standard post processing - blurred strip somewhere.

Link | Posted on Apr 28, 2018 at 12:26 UTC

Marcio Cabral won also another international contest - Oasis Photo contest (Italy). Similar image, no anteater applied.

Here is the link: https://oasisphotocontest.it/marcio-cabral-winner/

Link | Posted on Apr 28, 2018 at 07:28 UTC as 78th comment | 3 replies
On photo Bristol Blenheim I in the The RAF - 100 years! challenge (2 comments in total)
In reply to:

Dutch Newchurch: This is a very nice study of a classic aircraft which served in Fighter Command, Bomber Command and Coastal Command. You’ve used the light reflected from the grass well and captured the detail and shape of the black-painted underside. This shot is ‘commended’ by the host, with full bragging rights.

Thank you!

Link | Posted on Apr 11, 2018 at 16:44 UTC
On photo The last 75 years in the The RAF - 100 years! challenge (13 comments in total)

Thanks all, just a little techncal note:

while the camera was set in continuous shooting mode (6 fps) the image was taken as a one-shot. 6 fps means that the distance between the planes changes at least 30 m/100 ft (3 times the Spitfire length) at every take. You can be much more precise than that.

I think you can get a 0.03 s timing precision instead of the 0.17 s given by the 6 fps. You have to compensate shutter delay - in this case I think somewhere between 0.10 s and 0.14 s - and track someway both airplanes while following just one (the Spitfire) in the viewfinder.

BTW while i'm usually good in this kind of precision timed photos, I can't deny I had a lot of luck - even the best sniper can't be SO precise to get this kind of overlapping.

Alberto B.

Link | Posted on Apr 11, 2018 at 16:35 UTC as 1st comment
On article Pentax K-1 Mark II: What you need to know (461 comments in total)
In reply to:

PaulSnowcat: I have Pentax KP on a test right now. It also has 819k ISO... Cannot say I am impressed by it at all... A slow outdated AF, non-consistent metering (LOTS of mistakes in not very difficult situations), not that great colors, built in RAW denoising which ruins details... I understand that KP is not K1-II but... After seeing KP I am not really excited about K1-II...

@Paulsnowcat, please note that pricewise the Nikon D500 is comparable to the K1, not the KP.

Link | Posted on Feb 22, 2018 at 02:09 UTC
On photo Homemade micro thermal power station in the The laws of thermodynamics challenge (2 comments in total)
In reply to:

Dutch Newchurch: It must be fun to see that in action. I think the physics textbook would also benefit from a diagram to show how it works. This shot wins an ‘Honourable Mention from the Host’, with full bragging rights.

Thank you, Dutch newchurch, I'll turn the bragging rights to my father, who is also a dpreview reader.

Actually the device was used by my sister - a high school Physics teacher - for some lessons about... yes, the laws of thermodynamics,

You wait until water boils and gets some pressure, then you help the engine start with a quick half turn of the flywheel. Then you can see the LED turn on and some thin but real white smoke from the chimney!

Link | Posted on Feb 22, 2018 at 01:48 UTC
On photo Winter sunrise in the Pop up flash challenge (11 comments in total)
In reply to:

Midwest: Wonderful shot. Creative and interesting.

Thank you, Midwest. It looks like many people found it interesting, for the good or the bad... :)

Link | Posted on Feb 13, 2018 at 20:49 UTC
On photo Winter sunrise in the Pop up flash challenge (11 comments in total)
In reply to:

arniebook: Very confusing and trashy looking foreground ... completely ruins what could have been a nice scene. Looks like cut up fish, pieces of plastic and other non-descript items which the eye can't get past ... really bothers my eye to see it on my screen while I'm reading forum posts. Distracting! Get rid of it!
I hate to be this harsh, and hope the poster has some thick skin and will keep shooting and sharing.

I meant to a WINTER scene, sorry...

Link | Posted on Feb 13, 2018 at 12:46 UTC
On photo Winter sunrise in the Pop up flash challenge (11 comments in total)
In reply to:

PhotonRustler: Shooting a sunrise with flash (as this is) makes it look like it's shot in a studio; completely unreal and unnatural. The foreground should be in shadow, obviously.

Yes, you are right, but I liked the unnatural look. And I don't care a lot about making photos that look natural, I think that a photo will never be a "natural" or "objective" reproduction of reality.

A black silhouette is widely accepted as "natural" in photography, but it has really nothing to do with human eye perception. So without a flash lighting, the sensor will see the leaf as a black silhouette, while the human eyes sees every detail in it. Who's wrong? It's a hard question.

Alberto B.

Link | Posted on Feb 13, 2018 at 12:43 UTC
On photo Winter sunrise in the Pop up flash challenge (11 comments in total)
In reply to:

arniebook: Very confusing and trashy looking foreground ... completely ruins what could have been a nice scene. Looks like cut up fish, pieces of plastic and other non-descript items which the eye can't get past ... really bothers my eye to see it on my screen while I'm reading forum posts. Distracting! Get rid of it!
I hate to be this harsh, and hope the poster has some thick skin and will keep shooting and sharing.

I don't agree, I also think that the ice in the foreground conveys to think to a scene.

Yes, you were a little harsh, but I prefer to call it a very strong opinion. So strong i cared more about it, it made me think for some time... but you don't convince me.

Thank you for your post anyway, I appreciate frankness.

Alberto B.

Link | Posted on Feb 13, 2018 at 12:21 UTC
On photo Winter sunrise in the Pop up flash challenge (11 comments in total)
In reply to:

pwmoree: Congrats. Very creative. Well done.

Thank you, pwmoree

Link | Posted on Feb 13, 2018 at 12:13 UTC
On photo Winter sunrise in the Pop up flash challenge (11 comments in total)
In reply to:

gary payne: Although I admire your composition and the courage you've demonstrated by not over saturating the image...IMHO the apparent use of flash contradicts the lighting in the scene. The low sun in the background sets a direction and mood that is confused by the too brightly lit items in the foreground from the other direction. Nevertheless I'd like to see what that would look like with increased blacks or contrast.

Hmm... maybe. I usually use the built-in flash mildly, so some people don't even notice I used it. In this picture I liked someway the "unnatural" effect. Obviously there is anyway heavy PP to compensate the uneven flash lighting - the items in the foreground range from about 5 to 25 cm (2" to 10") distance.

Anyway, thank you for your comment, Gary.

Alberto B.

PS And... yes, saturation is a big temptation. I sometimes take the PP to a Wow! effect but finally I come back halfway.

Link | Posted on Feb 13, 2018 at 12:13 UTC
Total: 76, showing: 1 – 20
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