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Forum: Pentax DSLR Discussion 07-20-2008, 05:54 PM  
What is the kit lens of K200D?
Posted By ckanthon
Replies: 20
Views: 4,083
I don't know exactly how to get those things from the DHL-dealers etc. But I can share the situations in HK we now have (just for fun reading).

The Mk2 was always shipped "only" with the kit package at around a package price of HK$5600 (USD568). The price in recent weeks has dropped further to USD505 whereas USD536 for dual kits lenses!!! Wow...Besides, the mk2 sold alone at USD120 now.

Someone said the mk2 is better (but I never made detail camparison). My opinion, at 18-19mm wide angle end the CA and distortion is "just usable" in urgent cases. People wanted to go for the new DA17-70 F4 (which is to be released next week in HK) but the price is really.... ;). Besides, the DA17-70 F4 at wide angle end also has CA+distortion. Peolpe said it would be better than the kit mk2 but I think only "a little" and you will get 56-70mm longer is real. Howver, it would not be so much better than the DA16-45 etc. The DA*16-50 than would be one of the candidate (comparative the price to DA 17-70 F4)
Forum: Pentax DSLR Discussion 07-20-2008, 04:16 PM  
What is the kit lens of K200D?
Posted By ckanthon
Replies: 20
Views: 4,083
You should have got DA 18-55 F3.5-5.6 AL II lense (Mk2). The Kit's carton of mine even printed "AL II".
Forum: Pentax DSLR Discussion 07-20-2008, 02:14 PM  
K10D Soft or OOF?
Posted By ckanthon
Replies: 20
Views: 3,619
I guess most of the K10d softness is due to front focusing or back focusing. Because many people report "sharper" after focus correction. Just a guess, I do not own K10d.
Forum: Pentax DSLR Discussion 07-19-2008, 04:30 PM  
Can K200D Use Ordinary CR-V3 Lithiums?
Posted By ckanthon
Replies: 36
Views: 20,847
I don't want to involve in any "conspiracy hypothesis" talk.
However, they really stated Energyier AA is good because "you dont even need a charger" in a K200d introduction video. See also differemt 'tax leaflets...

Maybe, Energyier Li- AA was the "only solution" they can think of...
Forum: Pentax DSLR Discussion 07-19-2008, 04:21 PM  
Can K200D Use Ordinary CR-V3 Lithiums?
Posted By ckanthon
Replies: 36
Views: 20,847
Agreed!!
Even different brands of AA battery their lenght is a little bit different.
2mm to 2.5 mm is nothing for a spring to travel thro'.
(If they were willing to design this way to accept the CR-V3 electronically)
Forum: Pentax DSLR Discussion 07-19-2008, 04:11 PM  
Can K200D Use Ordinary CR-V3 Lithiums?
Posted By ckanthon
Replies: 36
Views: 20,847
Yeah Yeah.
Handle part and sizes of the K200d chassis should be the same as K100DS.
Physically both are the same for the battery compartment.
K100DS can physically do. why not use CRV3 for K200D? :confused:
Forum: Pentax DSLR Discussion 07-19-2008, 04:07 PM  
Can K200D Use Ordinary CR-V3 Lithiums?
Posted By ckanthon
Replies: 36
Views: 20,847
HaHa !!!!!:D

DO NOT TRY TO REMOVE CRV3 outer casing !!!!!

There was one case reported in China web forum. Trying to do this the battery exploded!! :p
Forum: Pentax DSLR Discussion 07-18-2008, 08:58 PM  
Can K200D Use Ordinary CR-V3 Lithiums?
Posted By ckanthon
Replies: 36
Views: 20,847
Well it was around that number of shots I would say. Actually it could be more. Around 150 shots or something I think because I also used flash. Never count it precisely. Therefore the exact number of shot is not that clear to me. But I think 2500mAH rechargeable which that level of performance is quite acceptable. (Only needed to bring along with me one package of spared Li-ion batteries it is no problem for me). :)
Forum: Pentax DSLR Discussion 07-18-2008, 08:03 PM  
Can K200D Use Ordinary CR-V3 Lithiums?
Posted By ckanthon
Replies: 36
Views: 20,847
Hi,

Partially agree with the situations. K200d improved power comsumption and 2500mAH NI-MH can produce around 120 shots. This is acceptable to me as I played it 1.5 day without changing batteries.
However, some people really using one piece of regulated CR-V3 together with two pieces of Ni-MH rechargeable batteries. These save money (non-rechargeable is lighter in weight but expensive) as well as enabling to take more pictures. Why dont they allow to use one piece of CRV3. (both ridges now blocked all)

However, if you see the differences between the originary CRV3 and the regulated rechargeable R-CRV3 batteries (see last photo), the difference bewteen them is only on the "lenght of the groove" (at the front side). The "stopper surface" of the CRV3 is a little bit wider than that of R-CRV3. Kodak P&S makes a position sensing switch at there to distingiush between 3V CRV3 battery or 3.8V R-CRV3 battery. That made the power circuit design a lot more simpler. Not that difficult to handle such power handling circuit when you have such a simple "Voltage" sensor.

One other issue is that the production quality of CRV3 on the market is a bit various. You needed to use the reliable brand.
Forum: Pentax DSLR Discussion 07-17-2008, 01:33 PM  
Can K200D Use Ordinary CR-V3 Lithiums?
Posted By ckanthon
Replies: 36
Views: 20,847
Hi,

For those who still wondering if CR-V3 (ordinary, 3V) or R-CRV3 (rechargable, 3.8Vmax) can be used on K200d or not, I can show you what happen by demostration that both CR-V3 and R-CRV3 cannot be used because they cannot be put in. (See attached pictures) Left one is UNiRoss R-CR-V3. Right one is Kodak ordinary CR-V3 (3V).

I dont know why my Kodak DC can support AA, CR-V3 or R-CRV3 but K200d just do not support this kindy of CR-V3 batteries. You can state any reasons such as CR-V3 is 2mm longer than AA or whatever etc for them. (But I think the springs can go 2mm)

I used Enerygier Ni-MH AA 2450mAH batteries (low-self discharge type). It last for 1.5 day shot. (Can spare them by 4 pieces of AA Li-ion batteries) OK for me.
Forum: Pentax DSLR Discussion 07-16-2008, 11:08 PM  
Front focusing while wide open???
Posted By ckanthon
Replies: 16
Views: 4,982
Thanks for your attached test result. Good for my reference as well. Thank you.
Forum: Pentax DSLR Discussion 07-15-2008, 06:11 PM  
New K200D - terrible color
Posted By ckanthon
Replies: 61
Views: 10,300
Yeah YEah.. Me too... Cannot see anything attached picture.
Forum: Pentax DSLR Discussion 07-15-2008, 05:22 PM  
Pentax documentation about AF sensor positions
Posted By ckanthon
Replies: 9
Views: 4,929
Useful reference information. Good Thread.
Forum: Pentax DSLR Discussion 07-15-2008, 03:37 PM  
Front focusing while wide open???
Posted By ckanthon
Replies: 16
Views: 4,982
Your case is almost exactly the same happened to my.....Normal!!!!!!!!;)
My K200d+kit Mk2, when open its F- number at F4.5, F4, F3.5... Picture found soft in portrait shots. Sharpness only acceptable starting from F8 onwards. I took shot at F4.5 on one street in Sham Shui Po at 5-6 pm. The focus almost run away.
After checking (indoor and outdoor), it was front-focusing (8-10%). The amount of F-F depends on the F-number. In fact, I concluded that the focus depnded on the F-number really.

I sent it to repair, afterwards, picture sharpness is OK. But at wide angle end (18mm,24mm,30mm) and at F3.5, F4, F4,5 or even F5.6, when shot objects far away (more than 8-10m) by using AF, the focus ring turned passed through the infinity mark and hit the hard-stop end.

Then I try the DA 18-55 old version in a shop in Hunghum, found no problem. I also bought DA 35 F2.8 macro limted... No such problems.

The problem is partially caused by the Mk2 Lens. But I also think the CCD position of K200d is constructed or placed a little bit too backwards that it left almost no margin for the technician to make fine-tune. (Believed a production QC problem there)

Good luck.

PS: When I was checking, I tried taken picture at 0.35m, 0.8m, 1.5m and 2.2m always also
Forum: Pentax DSLR Discussion 07-14-2008, 05:42 PM  
A portrait I could never have taken with my K10D
Posted By ckanthon
Replies: 8
Views: 3,299
Suggestion from other P-fans:

P&S of Pentax W60 is good!!
Forum: Pentax DSLR Discussion 07-13-2008, 08:46 AM  
Does K20D's AF adjustment get applied to MF lenses?
Posted By ckanthon
Replies: 14
Views: 3,337
Hi morfic,

Thanks for your clarification. I think it is a good reference scheme for the K20d fous fine-tune.

This also help me to understand more about the AF senoring behaviour.. Thank you.

BTW, Pentax should had better have such scheme on the manual for K20d user to refer to!!

I think "apply all" is "applied all" :)
Forum: Pentax DSLR Discussion 07-13-2008, 12:46 AM  
Does K20D's AF adjustment get applied to MF lenses?
Posted By ckanthon
Replies: 14
Views: 3,337
HaHa...My misunderstand then... very kindly of you to re-assurance me...

But I am still did not get a full picture about your concerns stated...

Did you got problem(s) on MF lens Nokton 58/1.4 only (when approaching from different directions: from "inifity" side or from "MFD" side?

Or else,. What adjustment setting 0 or 5 affected your picture shot?

Just intereted to know...:)
Forum: Pentax DSLR Discussion 07-13-2008, 12:34 AM  
Does K20D's AF adjustment get applied to MF lenses?
Posted By ckanthon
Replies: 14
Views: 3,337
It was just what a saw from a blog in tw that a guy tested DA*16-50 and DA*50-135. He said the earlier lenses with SDM seemed "run overshot a little" when he compared then with a sigma lens.
When taken shots with the same settings, the sigma lens was sharper whereas there was a little bit blurr seen on the DA*50-135. Test the DA*55-135 using MF seemed OK. He posted several pictures. I did not test these but just saw his review.
Forum: Pentax DSLR Discussion 07-13-2008, 12:27 AM  
Does K20D's AF adjustment get applied to MF lenses?
Posted By ckanthon
Replies: 14
Views: 3,337
Hi, Thanks for your suggestion in this regard. whereas when I said "hitting a hard stop when I used wide angle at f2.8 to shot distant object". What I also meant was that it already hitted the stop-end when I focused to objects 8m away. Therefore, I think using f2.8 and wide angle to shot like this is not 100% my "mis-use". Now I carefully select my F-number at wide angle shot. F8 would be fine. Anyway, it is not suppose to hit that end :(

I also not sure, but the AF sensor of K200d seemed reacted a little differently when it saw wide angle f3.5 focus of my kit mk2.
Forum: Pentax DSLR Discussion 07-12-2008, 11:52 PM  
Does K20D's AF adjustment get applied to MF lenses?
Posted By ckanthon
Replies: 14
Views: 3,337
When you adjust the focus at 16mm and wide open Aparture (such as f2.8), you might have the problem complicated by the sensor's limited capability. As suggested by Rice, the sensor is not perfectly doing its job as a "f2.8" sensor can do. Then, your focus setting could already be adjusted OK. But the sensor simply moved away (because it behaves imperfectly when it saw a f2.8 imperfect focus)!!
Could these be one of the reason that you could focus OK at 31m, 50m while not OK at 16mm ?!? :)


Noticed also that in TW, one K10d user reported that the AF SDM of DA*16-50, in fact, it "overshot" a little. It did not stop as quick as it should be. Then it could also led to a back-focusing. This overshot can be verified by trying the Manual Focus.
Forum: Pentax DSLR Discussion 07-12-2008, 11:40 PM  
Does K20D's AF adjustment get applied to MF lenses?
Posted By ckanthon
Replies: 14
Views: 3,337
I have only K200d only. But in HK there was one case of a P-fans. He used K20d. His case was quite similar to yours. He adjusted +4 on one day but the other day it seemed to be -3 better etc.

I had front focus problem before. After adjustment by Pentax's service agent, it seemed that the focus now worked fine for the Kit Mk2 as well as a DA 35mm F2.8 Macro Limited up to his moment.
(Only thing still annoyed me now was the "hitting a hard stop at infinte" issue of my kit lens, see thread
https://www.pentaxforums.com/forums/pentax-dslr-discussion/31786-will-your-k2...have-like.html)
But I think it was just a matter of factory QC and insufficient margins of the body + the kit lens mixed together. My DA35mm F2.8 macro does not have the problem of "hitting a hard stop" when focus it to distant objects.

Therefore, If adjustment by within the +/-5 range on your K20d manual had failed, the AF sensor position should better be re-adjusted by service centre first. Therefore, it is suggested to send the stuff to the service centre to do the adjustment/finetune.

Noticed also that when you do the fine-tune, it's had better to chioce the largest Aperature. Also, it is supposed making a larger angle of shot towards the chart paper as well.

While waiting for other K20d users Feedback, hope these information help a little :)
Forum: Pentax DSLR Discussion 07-10-2008, 05:51 PM  
Will your K200d + Kit Mk 2 behave like this??
Posted By ckanthon
Replies: 18
Views: 4,186
Thank you very much for your inputs and information.

A) In fact, At wide angle settings, when shot at distant objects, Aperature wide open (F3.5, F4, F5.6 etc), the AF always hits the hard stop and stary there.
Thing only goes much normal when F-stop down to F8. And there is not problem at 35mm, 55mm lenght.

B) Before sending the K200d kit to Jebsan for focus fine-tune service, the K200d kit was Front Focused without hitting a hard stop during AF :)

Thanks again for caring this matter :rolleyes:
Forum: Pentax DSLR Discussion 07-10-2008, 12:12 PM  
Will your K200d + Kit Mk 2 behave like this??
Posted By ckanthon
Replies: 18
Views: 4,186
To me.. AF passing the Infinite Mark is OK... but hitting the end limit of the focus ring (hard stop)everytime during AF at wide open Aperature is very annoying....

That was why I questioned why the focus ring was designed this way: "2m" than "inifite" than "stop at the end" so soon. I also insisted Pentax must allow K200d user to do focus correction on the manual (for different lenses) in order to cure the root cause (a little).

I think the phenomen not 100% fault of "Pen design" but it is really linked to design errors, factory QC, how to handle Uncertainty of each indivdual product produced....deviation from idealness of protool type....lack of degree of freedom for post production optical adjustments, finetune...
Forum: Pentax DSLR Discussion 07-10-2008, 11:32 AM  
Will your K200d + Kit Mk 2 behave like this??
Posted By ckanthon
Replies: 18
Views: 4,186
Hi Gentlemen,

Thanks for your great advises as well as the linked information (which I quickly read thro').
Basically, I think what happened to Ben DA 21 also happened to my Kit Mk2. Except mine was Front Focus before the repair service:(
In fact, for very long time, I had decided to used DC "P&S" instead of using DSLR what's that I knew optics system(s) could be very tricky to deal with: Slightly mis-alignment with a little bit error could already ruin the system's performance because optics required accuracy in "one wave-lenght" levels. I learned this while I did laser projects in polyU time. Simple setup is better than system built with lens + mirror(s) etc....
I eventually switched to DSLR because I really started to feel not satisfact with my 7M pixels P&S whereas the latest P&S with higher M-pix seemed did not have real improvement on IQ (In fact, IQ of most of the Higher MegaPixels P&S really stepped backwards I realized). Obviously, now I get more after entering the "P" world but I still did not get what I supposed to....Ok....

Yes, I can confirm the "German guy's finding": focus (focal lenght of a piece of lens) depends on F-number. I can explain this phenomeon using my limited knowledge learnt in high school times.....It is caused by "lens imperfection". A real lens cannot be perfect in real life....In fact, when the Aperature is widely open, the focus at the centre of a piece of lens can NEVER be concidely overlapping with the focus point obtained at the "rim" of the same lens (not matter how high quality of the lens produced). This resulted that the "a real focus" of a bundle of parallel light from infinite, caught by a wide open lens, is in fact "an area" or in fact "a 3D oval region" rather than "a spacial spot". An "AL" or "ED" lens improved a little but not all.
But the "problem" here also caused by (or mixed complicately by) the characteristic of the AF sensor...how it responds to those images produced by non-ideal lenses.....

What I could say now is that I have a bit of BAD LUCK... that I already find a problem with my kit mk2.....not even before I buy a second piece of lens....In fact, the problem really not purely caused by the lens but by the "combined" error of the lens + the body when put them together..... List them: design error + illed tolerances + manufacturer QC + lack of final fine-tune + combined unceratinty when puttng them together + .. ..
I will cantact Jebsun again and decide whether I will buy more lenses to play with...! :confused::)
Forum: Pentax DSLR Discussion 07-10-2008, 06:10 AM  
Will your K200d + Kit Mk 2 behave like this??
Posted By ckanthon
Replies: 18
Views: 4,186
Hi Rice,

It is nice to see you here in a "sunny" afternoon and better weather in the evening (nearly everyday is raining like cat&dog!!)

Oh! partially correct. In my case, when aperature is set at F3.5 or F4 (cloudy day), the AF goes beyond the infinite mark for shot at distant objects (and it hit the end limit). Whereas when aperature is set at F/8 (bright sunny day), the problem seemed disappeared.

Unfortunately however, this phenomena happened AFTER Jebsun fine-tuned the focus of my K200d Kit!!! Before that, the K200d was Front Focus with my kit lens.. Pictures were only sharp until F/8, F11 or higher. Besides, after the fine-tune they said the lens was OK.

I suspected, it is an error of positioning the optical element(s), the CCD plane could have been placed a little bit too backward, therefore the AF sensor unit was also adjusted too downward by Jebsan. (But I dont know exactly. I just a guess)

Thanks for the advises!
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