February 27, 2015, 08:33:42 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Topics - hamada

Pages: [1]
Canon General / MIT study about online reviews & fanboys
« on: July 15, 2013, 06:09:45 PM »
Self-Appointed Brand Managers
The second explanation is in some respects the reverse of the upset customers explanation. It is possible that these customers are acting as “self-appointed brand managers”. They are loyal to the brand and want an avenue to provide feedback to the company about how to improve its products. They will even do so on products they have not purchased.9
We can further investigate this explanation by asking: when would a self-appointed brand manager be most likely to write a review? One possibility is that customers are more likely to react when they see a product that they did not expect. If a customer, who has only purchased women’s apparel from the firm, is browsing the firm’s website and notices that the firm now sells pet products (for example), this may prompt the self-appointed brand managers to provide feedback by clicking the button inviting a review. Why would self-appointed brand managers be more likely to write a negative review? The French have a phrase that may help to answer this question: “Qui aime bien châtie bien,” which translates (approximately) to “your best friends are your hardest critics.” We investigated whether there is a relationship between the number of items that customers have purchased and the reviewers’ product ratings. The pair-wise correlation between a reviewer’s average product rating and the number of items purchased is 0.048 (p < 0.01). In other words, the most loyal customers are the most negative reviewers.
Prior Units Index: The total number of units of this item sold by the firm in the year before the date of the review. At the request of the retailer we index this measure by setting the average to 100% for the reviews with a prior transaction. We investigate this possibility by calculating the following measures:
Niche Items: Equal to one if Prior Units is in the bottom 10% of items with reviews, and equal to zero otherwise.
Very Niche Items: Equal to one if Prior Units is in the bottom 1% of items with reviews, and equal to zero otherwise.
Product Age: Number of years between the date of the review and the date the item was first sold.
New Item: Equal to one if Product Age is less than 2 years and equal to zero otherwise.
New Category: Equal to one if the maximum Product Age in the product category is less than 2 years, and equal to zero otherwise

In the Table 9 we report the average of each measure for reviews with and without prior transactions. The findings reveal large (and highly significant) differences on all of these measures. Reviews without a
prior transaction are more likely to be written for items that were introduced recently. They also tend to be niche items with relatively small sales volumes. These findings are all consistent with the prediction that customers are more likely to provide feedback on items they had not purchased when they see the firm selling a product that they did not expect to see.

something interesting to read.... i bet it fits many members here.....


Site Information / banning people for nothing at canon rumors
« on: June 13, 2013, 11:40:55 AM »
in behalf of the member canon-f1 i post this (i did send it to the admin too):

he asked me to do so as he knows me as a fellow german member.

Quote from: canon-f1

mt spokane photography bans member just for disagreeing with him.

he has banned me permanently for no reason.

i wonder if he can present ANY reason for this permanent ban other then his ego.

check my posts and look if there is anything from me for that i deserve to be banned.

he is just one of these mods who have nothing in real life so the act like little dictators in virtual life.

the reason i was banned for must be this:

well spokane did not notice the error... so all is fine and adobe and all who have an issue are wrong.

i did not wrote anything after that.
and nothing before, that justifies a ban.. outside mt spokanes head of course

if he dares to say there was... he should post it!!

i have to say i looked at his last posts and i don´t see why he was permanently banned.   ???


Lenses / EF 14-24mm and Filters
« on: May 13, 2013, 06:33:54 AM »
how likely is it that a EF 14-24mm can be used with screw on filters?

will it have a bulged frontelement that prevents the use of filters?

Technical Support / extention tube calculations? help needed.
« on: April 27, 2013, 05:58:57 AM »
hi, i bought a set of extention tubes for my macro work.

i need someone who can to explain to me how to calulate the new MFD and magnification.

for example when i put a 25mm extention tube on my 90mm macro that has 29cm MFD and 1:1 magnification... what is the new MFD and magnification?

or what if i put a 31mm extention tube on my 70-200mm f4.

is there maybe a good website that explains how to calculate this?

EOS Bodies - For Stills / The 700D Placebo
« on: April 24, 2013, 05:01:46 PM »
Canon Rebel T5i (700d) Hands-On

it´s sad.. but well ... it´s the truth.

Software & Accessories / Lenspen Sensor Cleaning Kit..is it any good?
« on: April 24, 2013, 03:34:41 PM »

someone here who has experience with this kit?

some say it´s good, some say the microfibers detach from the pen and make everything worse.  ???

Lenses / a site like motleypixel but more up to date?
« on: April 11, 2013, 09:21:37 AM »

is there one?

i know there are plenty of review sites with tons of infos and 10 pages for every lens.

but is there one like motleypixel that just shows an image of the lens and sample pictures?

i thought about buying a kit but i got a very good deal for a 2 month old 6D body.

but now i need a good standard zoom for my new FF camera.

main use will be landscape photography.
ultimately i will buy a 24mm TS or 14mm one day for landscape work.
but right now i don´t have the money.
and i need a standard zoom anyway, so buying a used 24mm TS yet is not an option.

so what is the best choice for best quality at the short end?

as im not bound to a kit anymore i have more choices then the 24-70mm tamron or 24-105mm canon.

1000 euro maximum.

EOS Bodies / Canon 5D MK3 or 6D Replacements... when?
« on: April 04, 2013, 05:30:20 AM »
first, this is not a troll post. :)

let me explain, im not rich but i spend all my spare money on photography and travel.
right now i have saved enough money to make the jump to fullframe.

but im not sure if right now is the best time.

i fear that if/when canon updates their sensor manufacturing (im sure they will soon), replacements of the current cameras will come faster then usual. 

and of course i want the best for my hard earned money.

im pretty happy with my 7D right now.
thought for landscape work there is this lust for FF.  ;)
i would love to have a canon camera like the D800E.
something around 30-32MP from canon with great DR and clean shadows you can push without introducing so much noise.

i can not switch to nikon, i could not afford it and i did not like the nikon handling.
as i said im not rich but over they years i have collected pretty good canon equipment.
always in mind that i may switch to FF, i bought good quality lenses (only EF-S i have is the 10-22mm).

i know nobody here knows what canons plans or is doing in the future.
but what do you think?

does this camera generation will last as long as their predecessor generations?
in case of the 5D MK2 that was 4 years.
i would not want to wait that long.. but when a new generation is out in 12 month i could wait.

Lenses / Tamron 24-70 f2.8 or Canon 24-105 f4 ??
« on: March 31, 2013, 04:30:58 PM »
im thinking about going FF and buying a 6D for landscape and portrait work.

there are two kits i can buy that cost nearly the same.

one with the Tamron AF 24-70mm f/2.8 SP Di USD VC (2549 euro).
the other with the Canon EF 24-105mm f4 IS USM (2489 euro).

im not sure what to buy.  ???

i have a 100mm f2.0 i will use for portraits, but i need something wide for landscapes.
have no money right now for a 14mm or 16-35mm.

i also have the 70-200mm f4 IS i use for landscapes.

so buying the 6D as kit with one of these lenses seems like a good idea.

what i want from the lens is sharpness and good contrast (AF speed is not that important).

main use for the lens would be landscape and architectural stuff.
well "architectural" means churches, bridges and stuff i shot when i travel.
not real estate photography. :)
what´s your experience or advice?

Pages: [1]