CJ Lan

CJ Lan

Lives in United States Palm City, FL, United States
Works as a Engineer
Joined on Dec 30, 2009
About me:

Learn more and enjoy the photograph

Comments

Total: 20, showing: 1 – 20
On Flickering fireflies in time-lapse article (34 comments in total)

The purpose of this exercise? I am not sure if I could appreciate it. Maybe the next project would be flying snowflakes in time lapse, coupled with, say, new age music. How about that? Good idea? Is this still the dpreview site with which I was previously familiar?

Direct link | Posted on May 23, 2014 at 16:55 UTC as 1st comment | 1 reply

I will be more interested to see the image quality after converting from 200mm to 400mm (?) using this converter.

Direct link | Posted on May 4, 2014 at 14:59 UTC as 7th comment
In reply to:

Michael Piziak: Several of these photos just don't appear real.
Most of them are amazing though.

As far as I could tell, only #6 and this one are not real.

Direct link | Posted on Apr 28, 2014 at 13:52 UTC

When did the Smithsonian competition start promoting fake art even not overly PS edited. It is surreal and, yes, it is fake. Maybe I am too old school.

Direct link | Posted on Apr 28, 2014 at 13:12 UTC as 10th comment | 1 reply
On Nikon D5300 preview (278 comments in total)
In reply to:

Jake64: The Cannonization of Nikon has begun. One model after another that share all too many features of the previous. OLPF removal aside, this is the same camera as the 5200. Even with the filter gone it only satisfies pixel peepers and no one else. But I guess that's what comes down to in the battle for market supremacy. It's pixels people understand and given that every manufacturer of DSLR makes good cameras, the folks looking to buy one to take photos of their newborn will look for quantitative values such as pixels, screen size, and the ability to instantly share their jpegs with a wifi receiver.

Just go for D7100 then.

Direct link | Posted on Nov 21, 2013 at 03:52 UTC
On Panasonic DMC-GM1 preview (631 comments in total)

Without grip, GM1 will likely be a bit small for most of users used to shooting dslr. I wonder if the price is competitive enough with Nex 5 series if one adds optional grip to GM1.

Direct link | Posted on Oct 22, 2013 at 15:55 UTC as 48th comment | 1 reply
On Olympus PEN E-P5 Review preview (494 comments in total)

I dislike this new studio setting. I really have hard time differentiating the quality of image between different cameras. Plus, it defeats the opportunity for me to make comparison with previous cameras. Why does dpreview make such a change?

Direct link | Posted on Oct 4, 2013 at 00:58 UTC as 169th comment | 3 replies
On Sony Alpha NEX-5R preview (145 comments in total)

When will the review on 5R be completed? I am waiting to see if the high ISO/low light performance of 5R is comparable with or better than 5N. Could Lars or Richard publish at least the studio test shots? The high ISO of 5N seems better than 6 and 7 and, if 5R is comparable or better, I will go for 5R because of its hybrid focusing and other features. Does it make sense?

Direct link | Posted on Oct 3, 2013 at 18:47 UTC as 4th comment
On Preview:canon-eos-70d (1311 comments in total)

I really do not like the layout of this studio test.

Posted on Sep 12, 2013 at 09:36 UTC as 179th comment | 1 reply
On Photoshop Gradient Tool: Blending Images article (223 comments in total)

I still do not think combining two or more pictures into one is a good photography principle and practice to follow or encourage.

Why does the author involve blending two pictures into one with the gradient tool. The gradient tool can be used without. I just do not see the point.

Direct link | Posted on May 28, 2013 at 15:55 UTC as 19th comment | 3 replies

Very informative. Thank you for posting.

Direct link | Posted on Oct 9, 2012 at 13:54 UTC as 2nd comment
On Rick Sammon's One Light Portrait challenge (13 comments in total)
In reply to:

Joe Pineapples: I see no connection between the sample image and the Vermeer masterpiece...

Yes, I see a "quite a good resemblance" but this is not a main point.

The main point is, yes, we could create stunning portrait shot using one light, two lights, bouncing lights, etc. Why mimicking a famous painting, using just one light, black background, etc., becomes a theme here? Why do we restrict ourselves to this principle for exercising portrait photography? Be creative, hosts! I hope you guys are not using the "challenge" as a platform to promote Rick's class.

Direct link | Posted on Sep 23, 2012 at 00:19 UTC
On Rick Sammon's Realistic HDR World challenge (9 comments in total)

Thank for the much better explanation. The rule only said to "avoid excessive saturation." I am clear about the theme now, but you have not answered my first part of question. Why this becomes Rick Sammon's style? Camera companies target on improving dynamic range of their camera. We as individual photographers always try to boost the details from shadow without incurring too much noise and control the highlight without loosing the details. What exactly makes Rick Sammon's style of HDR images different?

Direct link | Posted on Sep 17, 2012 at 15:25 UTC as 5th comment
On Rick Sammon's Realistic HDR World challenge (9 comments in total)

How is Rick Sammon's style of HDR images different from others? I guess my question is what exactly the style of HDR images I produce fits into this particular "theme." Please advise.

Direct link | Posted on Sep 16, 2012 at 21:04 UTC as 6th comment | 1 reply
On Golf course picture for commercial purposes challenge (2 comments in total)

Not at all. The challenge is entitled so to encourage the interested individuals to submit a piece of work they think having the professional quality.

Direct link | Posted on Apr 13, 2012 at 03:23 UTC as 1st comment
On Pentax K-01 preview (376 comments in total)
In reply to:

CJ Lan: I am neither Canonian, Nikonian, Pentexian, or micro 4/3 users. I use/like a camera as long as it is good in features and practical. Honestly speaking, I do not quite understand the philosophy behind the Pentax design engineers. Not getting into full frame market before jumping into very expensive medium format 645, interchangeable lens system with tiny p&s sensor (Q), now a bulky mirrorless camera. and who knows the next in the future. Correct me if I am wrong. I thought the main purpose getting rid of mirror is to achieve portability of a interchangeable lens camera system. What does K-01 try to accomplish in this regard? If just for using the existing line of lenses, I would rather stick with K-5 or any other Pentax APSC for their professional looks, not this as bulky and toy-looking "SLR".

It is interesting that you think the main reason for mirrorless camera is not reduction of size and weight. I wonder what benefits will that be. It already sacrifices the optical viewfinder and faster AF (contrast detect instead of phase detect) featured in the regular DSLR. If not for reduction in size and weights, again, what other advantages does a mirrorless camera offer. Please advise. Maybe I could learn something here.

Direct link | Posted on Apr 2, 2012 at 02:31 UTC
On Pentax K-01 preview (376 comments in total)

I am neither Canonian, Nikonian, Pentexian, or micro 4/3 users. I use/like a camera as long as it is good in features and practical. Honestly speaking, I do not quite understand the philosophy behind the Pentax design engineers. Not getting into full frame market before jumping into very expensive medium format 645, interchangeable lens system with tiny p&s sensor (Q), now a bulky mirrorless camera. and who knows the next in the future. Correct me if I am wrong. I thought the main purpose getting rid of mirror is to achieve portability of a interchangeable lens camera system. What does K-01 try to accomplish in this regard? If just for using the existing line of lenses, I would rather stick with K-5 or any other Pentax APSC for their professional looks, not this as bulky and toy-looking "SLR".

Direct link | Posted on Apr 1, 2012 at 11:01 UTC as 41st comment | 11 replies

(cont.)

(2) You need to experiment the size of hole to avoid vignetting. The first ring I have made/used is the hole that will give me one stop down of the light, which means the diameter of the ring hole is 1/sqrt(2) of the diameter of the adapter flange attached onto the camera. This cheap adapter with home-made ring serves me well. I do not notice degrading in image quality.

You might wonder how many sizes of rings one needs to make and it will be inconvenient to swap them. In fact, for micro 4/3 cameras, the sweet aperture is around f4-f5.6. Too small ring hole should be used with caution to avoid diffraction limits and loss of sharpness. Therefore, so far, I have only used one fixed size ring mentioned above, which gives me one stop down of light. I also found it is useful to avoid shutter speed go out of ceiling (1/4000 for my Oly EPL2), in particular under bright sunlight.

Direct link | Posted on Mar 27, 2012 at 14:58 UTC as 3rd comment

Some Canon lenses such as EF-S 10-22mm could NOT work with the adapter with built-in aperture control, due to the extruding rear element. This happens to be one of my favorate lenses. What should one do? Well, here is the poor man adapter. Simply buy the simple Chiese-made adapter (w/o aperture control) around $15 bucks and then attach a home-made ring.

Several coveats though:

(1) ring needs to be higher quality plastic otherwise you will leave lints around th edge after you cut it into shape. You do not want the lints to get onto sensor or inside the camera body. It is also preferrable to use black, non-reflective material to avoid internal light refection.

(cont.)

Direct link | Posted on Mar 27, 2012 at 14:57 UTC as 4th comment

You could unfocus but, the problem is, can you refocus!

Direct link | Posted on Jun 22, 2011 at 19:47 UTC as 66th comment | 1 reply
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